“Above the Clouds”: Week 1

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Principal photography has begun on my latest feature, Above the Clouds, a comedy road movie written by Simon Lord and directed by Leon Chambers. The film stars Naomi Morris as Charlie, an 18-year-old learner driver who sets off on an epic road trip from Margate to Skye with a ‘gentleman of no fixed abode’ as her responsible adult.

 

imageDay 1 / Monday

It’s a very different shoot to my last one. With a five figure budget and a total crew of about ten or twelve, we’re lean and mean. About a quarter of that crew are working for me – 1st AC Rupert Peddle and 2nd AC Max Quinton, veterans of Heretiks, and my long-serving one-man lighting team, Colin Smith. We’re shooting on an Alexa Mini. Although it’s lovely how much lighter it is than the full-size model, it’s quite fiddly. It doesn’t help that the EVF is faulty, and while we wait for a replacement Max has to change many of the settings via a smartphone app. The lenses are Arri/Zeiss Ultra Primes, my first time with these, and I’m once again using a half Soft FX filter to take off the digital edge.

We start with a dining room scene. As many of the sets will be, it’s built in director Leon Chambers’ living room, so it’s not very big. We’re prepared for this though, and Leon has purchased several Rosco Litepads in 6″x2″, 4″x4″ and 12″x12″ sizes. We stick a 4×4 to the wall behind each character as hairlights, and rig the two 6x2s, at a perpendicular angle to each other, to a flag arm. Wrapped in unbleached muslin, they’re a pleasing key.

image

After lunch we move into the shed, dressed as a young artist’s studio, complete with coloured string lights. Colin and I add three tungsten bulbs as additional practicals, plus a couple of the Litepads amongst the rafters. Outside the window we place a 4×4 kino or 2.5K HMI depending on the time of day.

 

imageDay 2 / Tuesday

Today we’re in Leon’s kitchen primarily, but with several of the scenes spilling into the hall and porch. We put our two HMIs outside the windows and initially use an LED panel on top of a cabinet and my brand new torch gaffered to the side of a cabinet to augment these for a scene that is meant to have an evening feel. Then we move onto a proper daylight scene and those have to go, to ensure all the light seems to be coming in from outside. The other reason they have to go is that we are now doing an ambitious steadicam shot which moves from the kitchen to the hall and porch, then back into the kitchen, then back into the hall and porch as characters exit the house. To the two HMIs we add the 4×4 kinoflo shining down the stairs, augmenting the natural light coming down from the landing windows. Thanks to the Alexa’s large dynamic range, we are able to accomplish the shot without any clipping, even when the door opens and when the characters move through the darkest part of the hall. The rest of the day passes in variations on the theme. I quickly find that the window positions are limiting and a fair bit of head scratching to make the angles work goes on before we wrap.

 

Day 3 / Wednesday

Back in the kitchen, one of our first scenes involves heavy smoke as a story beat. I decide to go with purely natural light, so that it’s soft enough to illuminate the smoke evenly, rather than producing shafts or pools.

After lunch we shoot a dusk scene in broad (albeit overcast) daylight. I cool down the white balance to 4300K and use a .9 soft edge graduated ND, just edging into frame, to bring down the sky a little.

Later we move to a garage, a scenario in which all the light is coming from outside through the door. Although this looks flat when the camera is looking into the garage, I decide not to fight that. When we look the other way I use matt silver bounce and a 4×4 kino to fill in.

 

Day 4 / Thursday

image

We’re on location at a roadside cafe, and I agonised long last night about how much lighting gear we should take. We don’t have transpo or security so reducing the kit means a lot less hassle for us all, though generally I prefer to have everything to hand just in case. Ultimately I decided to keep it small – just LEDs, a 4×4 kino and then flags and bounce – knowing from location photos that there will be plenty of natural light.

In fact there’s too much. The photos failed to warn me of the skylights, which take a while to block with floppy flags and Easy Up walls clipped between them. Leon has set me up for success though by choosing to shoot the scene with the windows (and therefore the key light) in the background. Flagging the skylights and ambience allows the window light to wrap around the actors in a pleasing fashion, and makes for great modelling in the close-ups, with the window light hitting the talent’s down-sides. This natural light approach requires you to work with and respond to that natural light as well, and so I embrace the appropriate ‘broken key’ look that the sun position creates on male lead Andrew, a homeless man with a troubled past. (‘Broken key’ is a term Shane Hurlbut uses to describe a key light striking the talent not quite from the side, but slightly behind.)

imageLater we shoot a scene in the Fiat 500 ‘Yellow Peril’ outside in the car park. I use a rota polar to find the perfect amount of reflection in the car windows, striking a balance between seeing some clouds (the film is called Above the Clouds after all) and seeing the characters inside.

Again the 4×4 kino proves the ideal source to bring up the light coming through the windscreen, due to its shape and softness. As shooting progresses, the sky darkens. A storm is coming. We drop the kino down to one tube, quartering the amount of key light and therefore allowing me to turn off the Alexa Mini’s internal .6 ND, bringing up the background by 2 stops and re-balancing the overall exposure. But after one more take the rain begins, and we have to wrap. Fortunately we seem to have everything we need in the can.

 

Day 5 / Friday

After watching the news in shock over breakfast, and wondering just how badly Brexit is going to screw the UK film and TV industry, we head to Leon’s for some more scenes in his living room studio. This time it’s dressed as a Travel Inn, and my lighting is motivated by the bedside practicals on the back wall. (Lighting from the back first – always a good plan.) We put a dedo above each practical and a divalite between those to give us something softer and little wrappy. The only other sources are a third practical and a Mustard Yellow gelled 1×1 LED panel outside the window, representing a streetlight. For a morning scene in the same set we put a 2.5K HMI outside the window and let the closed curtains diffuse it, with no other sources.

The set is then reconfigured into reception, and I employ a cross-backlighting set-up, with an added LED panel to represent the glow from a computer monitor.

 

imageDay 6 / Saturday

Today’s location is a tiny little mechanic’s garage in the middle of nowhere. Most of the scenes take place in the doorway, so we are at the mercy of the weather, which is incredibly changeable. Bright sunshine, cloud and heavy showers alternate throughout the day.

On the first set-up I ask to wait for cloud on at least one take because I can see from the sky that is going to be the easiest thing to match to as the day goes on. Balancing the light inside and outside the garage will also be easier in cloud, even though the Alexa’s incredible dynamic range can handle it in bright sun too.

Aside from the weather, the big challenge for me is making the shots looking into the garage have depth. The best depth is normally achieved by having the brightest area of the frame be the background, and the darkest area the foreground. Looking into the garage though, the opposite is true. But there are other ways of creating depth. One is to make pools of light with practicals, so I leave on the location’s suitably grungy fluorescents. Another is smoke, so we pump a little in and use a 2.5K HMI through a window and a 4×4 kino tucked around a corner to pick it up.

image

After dinner we have a very brief night scene to do. The blocking suggests raking the 2.5K across the front of the building which will also three-quarter-backlight the talent. Extensive experience of doing this in the past warns me that the angle of incidence could cause a massive reflection of the lamp in the shiny garage door, so I choose the lamp position carefully, and push it through an 8×8 frame of full silent grid cloth to mitigate any glare. Also this particular film seems to call for a ‘softly, softly’ approach to moonlight. It’s not fantasy, it’s contemporary comedy, so most of the time my night sources will be streetlights to keep it feeling realistic, but when I have to use moonlight as motivation I don’t want it to be hard and draw attention to itself.

The diffusion looks great, and the door is glare free, but I failed to consider the window. Fortunately Rupert spots a way to flag it. Saved by a great team!

All in all, a very productive day and a good week.

“Above the Clouds”: Week 1

Sophie Black: The Story of “Songbird”‘s Crowdfunding Success

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Last week filmmaker Sophie Black‘s crowdfunding campaign smashed through its target. I asked her to share the story of how Songbird, starring X Factor contestant Janet Devlin, raised its funds. And if you’re interested in contributing yourself, the campaign is still running here. Take it away Sophie…

In all honesty, I was dreading the thought of crowdfunding for Songbird. I’ve worked on more fundraising campaigns than I can count (for myself and on behalf of other directors) ever since the early days of the format. Back then, it still seemed unique and exciting, and it was a little easier to reach your goal. Nowadays, everyone and their dog seems to have a funding campaign, raising money for films, inventions, albums… even personal ventures such as holidays and weddings!

The market has become over-saturated, and it’s more likely that your campaign will get a reaction along the lines of ‘not another one!’ rather than the intrigued enthusiasm you’re looking for. I’ve seen a steady decline in the amount of funds I’ve been able to raise over the years; my most recent campaigns, for the films Ashes and Night Owls respectively, were only able to raise between £800 and £2000, and even those amounts came after a hard fight.

However, if you want to get a film made, and you can’t afford to finance it yourself, crowdfunding can be a lifeline. There are very few funding resources for independent films, particularly short ones, and when my traditional funding applications for Songbird all proved unsuccessful, I was left no choice but to face crowdfunding again.

image

For me, there was one condition to running another campaign; I wanted someone attached with a fanbase. It’s clear by now that the most successful campaigns have someone involved with a good online following – be it the lead actor or even a director with a decent level of buzz around them. Another independent filmmaker I know, Helen Crevel, recently raised over £5000 in a couple of weeks because she had Doctor Who star Colin Baker attached to her film. And I’m sure we all remember how well Zach Braff’s fundraising campaign went, starting a chain of big-name campaigns.

Janet Devlin was a name that came up early on in pre-production for Songbird. Writer Tommy Draper had her in mind during some of the first drafts of the film, and I’d also been a fan of her music for a while, so I was aware of certain similarities between her and the lead character of Songbird, Jennifer. She also has a beautiful singing voice, so we knew that the musical elements of the film would be in safe hands. But, creative reasoning aside, if you had to just look at the casting from a business perspective, Janet has a huge online following across Youtube, Twitter and other social media, and her fans are very vocal and proactive in their support of her work. For all these reasons and more, we are very, very lucky to have Janet on board – and from the moment she announced her involvement in Songbird, the amount of interest in the film doubled – as did the amount of followers on the Triskelle Pictures Facebook page!

Even with those initial seeds sewn, myself and my team still launched the crowdfunding campaign with some trepidation. We had an early boost, as we were able to raise over £1000 within the first 24 hours. By the next day, we were on £1500… and then it stayed around that mark for about a week. An early sense of security was immediately replaced by doubt and fear, as well as emails from backers asking what would happen if we didn’t reach our target. There was always a certain amount we needed to raise in order to make the film, and as we’d set up our Indiegogo campaign to give us whatever funds we raised, even if it was too little, we were putting ourselves at risk of a fall.

Between myself and my core team, we had managed to raise a small amount of the budget ourselves before the campaign started (less than £1000) so we were able to drip-feed this into the campaign on and off in small amounts to keep it appearing active when we needed to. But we tried to keep the momentum going in other ways; as well as the standard social media posts morning, noon and night (the ‘bugging’ element of crowdfunding that no one really likes!), producer Laura Cann contacted relevant online magazines who might be interested in the campaign – fans of independent filmmaking as well as fantasy – and we both posted the campaign in relevant Facebook groups and forums.

We also maintained interest in the film by releasing new videos about it every time we hit a certain benchmark in our funding campaign (£500, £1000, £2500 etc). For added intrigue, we kept the title and content of each video secret until the subsequent one had been released. This was a technique director Neil Oseman and I first used during the post-production funding campaigns for Stop/Eject; it worked well then, and gave our followers some nice insights into the production, so I was keen to do it again. But there was one mistake we made back then that I didn’t learn from; once again, I didn’t get all of the videos ready ahead of the funding campaign. I did the first two/three, thinking we’d have plenty of time before the next target was reached. What happened next scuppered that plan…

Although the first surge of donations was unexpected, the people who donated were, to a degree, ‘accounted for’: they were people we knew, people who had supported our campaigns before, or film fans keen to find out more about a new film. These are your target audience for a standard fundraising campaign, and the type of people you usually expect (or rather, hope) will donate.

But behind the scenes, Janet’s fans had been slowly sharing the campaign page on social media, and the amount of ‘tweets’ and ‘mentions’ had grown steadily. Tommy helped aid this by making a list of people he noticed regularly shared Janet-related news, and he encouraged them by contacting them and thanking them, or by asking them directly to contribute. Janet and her team had also been working hard, not just behind-the-scenes but in effective public posts; as well as sharing her fans’ tweets, Janet posted a photo of herself writing the songs for Songbird, with a link to the campaign in the comments below. This gained more attention than any repetitive sharing of the campaign page alone would do.

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Eight days into the Songbird campaign, we were stuck at around the £1500 mark still. I was producing a corporate shoot in the middle of a field that day, with minimal signal, so I didn’t pay much attention to my phone or the campaign. It didn’t seem overly active at the time. By the time I got signal again, we had nearly reached our target. We had suddenly had a surge of big donations – some in the £100s, as we had received on day one, but even a couple of £1000s. Two days later, we had not only reached our goal, but we had surpassed it by £2000. As I write this, the current total is just over £10,000. We asked for £7,500.

Getting more than you ask for isn’t all fun and games; it means that the cut Indiegogo (or whichever hosting site you use) will be much bigger, so you need to prepare yourself for that. Also, unless you double your budget, your new funds won’t be enough to boost every department of production, so you need to be clever about how you spend it. It can be good to think about things you didn’t have before, that you can now afford (most people forget to budget for post-production and festival entry fees in their initial budget. Going over target can enable you to think about that properly for the first time) rather than upgrading elements you already had. The other, final downside is that you need to be careful about where you put the money once it’s ready to be transferred; you can’t have amounts as big as £10,000 moving around your bank account without making sure its accounted for down the line!

But, these minor inconvenient truths aside, my team and I are of course ecstatic about having smashed our goal. We’re beyond-words grateful for all the support we have received so far. We went from being rejected for funding to raising 134% of our budget within a fortnight. And, with the unpredictable nature of crowdfunding, all I can say in conclusion is that it’s down to three things: 1) having a popular name in the lead role, 2) my core crew working damn hard every day, and 3) a good old dollop of flukey good luck on the end. Having Janet’s fan base behind us is a privilege, but I like to think that personally keeping a good online presence and supporting other independent filmmakers over the years might have given us a boost too, even if it was on a smaller scale. Because the first person who donates to your campaign – be them your friend, your colleague or even your Mum – is just as important as the person who takes you over your target.

Sophie Black: The Story of “Songbird”‘s Crowdfunding Success

Poor Man’s Process II

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Back in 2013 I wrote a blog about Poor Man’s Process, a low-tech method of faking shots inside a supposedly moving car, using lighting gags and camera movement to sell the illusion. But Poor Man’s Process doesn’t have to be limited to cars.

While gaffering for DP Paul Dudbridge on By Any Name, we had to tackle a nighttime scene in which the hero flees through a forest. Rather than trying to get close-ups with any kind of tracking rig, Paul decided to use a technique apparently favoured on Lost, whereby the actor and camera are stationary, and lights and branches are moved around them to create the impression of movement.

It worked a treat, so when faced with a very similar scene on Ren, I shamelessly ripped Paul off. The actors weren’t sure; they felt pretty silly running on the spot, but we persevered. My lighting set-up used the 2.5K HMI, already rigged for earlier shots, as a side key, and an LED panel as three-quarter backlight. Branches were waved in front of both to throw shadows, and I shook the camera a lot.

Poor Man’s Process was required a second time on the series, in the very last scene, on the very last day of the shoot.

Sophie Skelton (Ren) and Duran Fulton Brown (Hunter) ride Tony the Phony Pony. Photo: Miriam Spring Davies
Sophie Skelton (Ren) and Duran Fulton Brown (Hunter) ride Tony the Phony Pony. Photo: Miriam Spring Davies

By this time we were one big happy family and we were all having far too much fun. Gaffer Squish was singing “One Day More” from Les Miserables, actor Duran was riding Tony The Phony Pony like a rodeo champ, candy was being freely imbibed and marshmallows were being toasted. The Poor Man’s shot seemed more like an extension of us all just larking about than anything else.

Ren and Hunter were required to ride off into the moonlight on a single horse, but the horse in question was quite jumpy and not safe for the actors to ride. Designer Chris and production assistant Claire knocked up the highly impressive phony pony, which was used extensively, but moving it fast enough for the final shot was out of the question.

Claire Finn prepares for some arboreal lighting action. Photos: Miriam Spring Davies
Claire Finn prepares for some arboreal lighting action.

So Tony remained stationary while Claire, her sister Alex and producer Michelle threw dignity to the wind and ran around with bits of trees.

I was using the 2.5K HMI as backlight, and a 1.2K HMI bounced off Celotex as a side key. Claire, I think, was on the 2.5K, jiggling a branch about to create some nice dynamism cutting up the hard backlight. Alex, if I recall rightly, was doing a windmill action with her branch in front of the Celotex. Michelle, meanwhile, stood ready with her branch until director Kate called “Tree!”, at which point Michelle would run past at full pelt and Sophie (Ren) would duck under the branch she was supposedly riding by.

You can see some behind-the-scenes footage in Lensing Ren episode 5.

Aided by smoke, a wind machine and the obligatory camera shake, the whole thing was quite effective. Less so the Epping Forest shots, which didn’t make the final cut. Somehow the running-on-the-spot was never quite convincing. Not enough choppy shadows, maybe?

My last project was a $4 million feature, but even that called for Poor Man’s in one instance. A small train carriage set piece had to appear to be moving as our heroes jumped onto it, so in front of each light we placed a ‘branch-a-loris’, a kind of man-powered windmill made from scaff tube and branches. Again lots of smoke, wind and camera shake were employed to sell the illusion.

I think Poor Man’s Process is one of my favourite techniques. It doesn’t always work, but if there’s enough movement in the camera and the lighting, and it’s cut in with genuine wide shots, it can often be extremely effective.

If you’ve enjoyed this post, please do me a little favour and vote for Ren: The Girl with the Mark in the Melbourne Web Fest Audience Award Poll (find us in the drama section). It only takes a moment!

Poor Man’s Process II

Diagnosing a Pharma Hack

neiloseman,

wordpress-bloggingToday’s post is not about filmmaking, but I hope it will be of use to other WordPress bloggers who have been the victims of so-called Pharma Hacking.

A few weeks ago I started to notice strange things happening on this site.

The first thing was that I couldn’t log in. At the top of the login screen there would be an error message similar to this one:

Warning: Cannot modify header information – headers already sent by (output started at /home/trustjho/public_html/blog/wp-content/themes/adspress/functions.php:74) in /home/trustjho/public_html/blog/wp-login.php on line 302

I googled the message and found various suggested solutions, but in the end the only one that worked was to reinstall WordPress.

The next issue was that the media gallery wouldn’t load. When I tried to upload a new image for a post it wouldn’t work, and I couldn’t see any of the images I’d uploaded previously. I tried all the usual WordPress troubleshooting – deactivating plug-ins and themes, which did nothing, and again reinstalling the core files. After the reinstall the problem went away for a little while, but soon came back.

The third thing I noticed was line breaks appearing after links in many of my posts. I checked the html code of the posts, but couldn’t see any reason for this behaviour.

Fourthly, and most worryingly, I started coming across a couple of weird sentences at the bottom of several blog posts – sentences which I didn’t write. It was always the same:

“Here what I remember even at that time when I sleep it Cialis Dosage which has to be fixed and can’t be. Cialis dose it is an important element of reception. Which it is necessary to remember.”

Both instances of the word Cialis were hyperlinks to a site selling the drug.

After hours of googling I figured out that I had been Pharma Hacked. Pharma Hacking involves uploading rogue code to your WordPress site which then inserts text and links into your posts. It also inserts javascript into the posts which renders the text and links invisible to human viewers, while still being visible to search engines. The result is that the linked drug site rises in search engine rankings because all these invisible links to it have been maliciously inserted into unsuspecting WordPress sites. Because the text is invisible, readers of the victim’s site and even the owner of the site may be completely unaware that it has been hacked.

When I looked at the infected posts in the ‘text’ view mode (as opposed to ‘visual’) I could see two additions, one at the start of the post:

<script type=”text/javascript”>// <![CDATA[
function get_style6610 () { return “none”; } function end6610_ () { document.getElementById(‘database6610’).style.display = get_style6610(); }
// ]]></script>

And one at the end:

<p id=”database6610″>Here what I remember even at that time when I sleep it <a href=”http://cialisdosage.biz/index.html”>Cialis Dosage</a> which has to be fixed and can’t be. <a href=”http://cialisdosage.biz/index.html”>Cialis dose</a> it is an important element of reception. Which it is necessary to remember.</p>
<script type=”text/javascript”>// <![CDATA[
end6610_();
// ]]></script>

Together the two pieces of javascript ensured that the text and link were not displayed. I’m still not sure why I was able to see the text on some of my posts when viewing my site’s front end, but it was lucky that I could otherwise I might never have diagnosed the problem.

After some more googling I downloaded Wordfence, a plug-in that scans your site for malicious code. Wordfence identified around eight or ten malicious files, which I immediately deleted. Straight away the media gallery started working again and the rogue line breaks after links disappeared.

Unfortunately Wordfence isn’t able to remove the text from your posts. I googled around for something that could, and in the end used a plug-in called Search and Replace. This was able to delete all instances of the sentence “Here what I remember….” and its hyperlinks, which turned out to be in over 900 of my 1,100 blog posts. I can’t remove the javascript, because the ID number in it (6610 in the example above) changes with every post, and I can’t find a search and replace plug-in that can handle a wildcard like that. However, without the text and links the javascript does nothing.

I still don’t know how my site got infected in the first place, but apparently the most likely route would have been through one of the old, out-dated plug-ins I was running. Evidently it is very important to regularly update not just WordPress but all of your plug-ins to make sure there are no security loopholes. And I will be performing regular Wordfence scans from now on to check for anything slipping through again.

Diagnosing a Pharma Hack

Choosing an ND Filter: f-stops, T-stops and Optical Density

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A revised and updated version of this article can be found here (aperture) and here (ND filters).

Imagine this scenario. I’m lensing a daylight exterior and my light meter gives me a reading of f/11, but I want to shoot with an aperture of T4, because that’s the depth of field I like. I know that I need to use a .9 ND (neutral density) filter. But how did I work that out? How on earth does anyone arrive at the number 0.9 from the numbers 11 and 4?

Let me explain from the beginning. First of all, let’s remind ourselves what f-stops are. You have probably seen those familiar numbers printed on the sides of lenses many times…

1      1.4      2      2.8      4      5.6      8      11      16      22

They are ratios: ratios of the lens’ focal length to its iris diameter. So a 50mm lens with a 25mm diameter iris is at f/2. If you close up the iris to just under 9mm in diameter, you’ll be at f/5.6 (50 divided by 5.6 is 8.93).

A stills lens with its aperture ring marked in f-stops
A stills lens with its aperture ring (top) marked in f-stops

But why not label a lens 1, 2, 3, 4? Why 1, 1.2, 2, 2.8…? These magic numbers are f-stops. A lens set to f/1 will let in twice as much light as (or ‘one stop more than’) one set to f/1.4, which in turn will let in twice as much as one set to f/2, and so on. Conversely, a lens set to f/2 will let in half as much light as (or ‘one stop less than’) one set to f/1.4, and so on.

 

If you think back to high school maths and the Pi r squared formula for calculating the area of a circle from its radius, the reason for the seemingly random series of numbers will start to become clear. Letting in twice as much light requires twice as much area for those light rays to fall on, and remember that the f-number is the ratio of the focal length to the iris diameter, so you can see how square roots are going to get involved and why f-stops aren’t just plain old round numbers.

A Zeiss Compact Prime lens with its aperture ring marked in T-stops
A Zeiss Compact Prime lens with its aperture ring marked in T-stops

Now, earlier I mentioned T4. How did I get from f-stops to T-stops? Well, T-stops are f-stops adjusted to compensate for the light transmission efficiency. Two different f/2 lenses will not necessarily produce equally bright images, because some percentage of light travelling through the elements will always be lost, and that percentage will vary depending on the quality of the glass and the number of elements. A lens with 100% light transmission would have the same f-number and T-number, but in practice the T-number will always be a little higher than the f-number. For example, Cooke’s 15-40mm zoom is rated at a maximum aperture of T2 or f/1.84.

So, let’s go back to my original scenario and see where we are. My light meter reads f/11. However,  I expressed my target stop as a T-number though, T4, because I’m using cinema lenses and they’re marked up in T-stops rather than f-stops. (I can still use the f-number my meter gives me though; in fact if my lens were marked in f-stops then my exposure would be slightly off because the meter does not know the transmission efficiency of my lens.)

By looking at the series of f-numbers permanently displayed on my light meter (the same series listed near the top of this post, or on any lens barrel) I can see that f/11 (or T11) is 3 stops above f/4 (or T4) – because 11 is three numbers to the right of 4 in the series. I can often be seen on set counting the stops like this on my light meter or on my fingers. It is of course possible to work it out mathematically, but screw that!

CameraZOOM-20140309092150072_zps94e90ea4
A set of Tiffen 4×4″ ND filters

So I need an ND filter that cuts 3 stops of light. But we’re not out of the mathematical woods yet.

The most popular ND filters amongst professional cinematographers are those made by Tiffen, and a typical set might be labelled as follows:

.3      .6      .9      1.2

Argh! What do those numbers mean? That’s the optical density, a property defined as the natural logarithm of the ratio of the quantity of light entering the filter to the quantity of light exiting it on the other side. A .3 ND reduces the light by half because 10 raised to the power of -0.3 is 0.5, or near as damn it. And reducing light by half, as we established earlier, means dropping one stop.

If that fries your brain, don’t worry; it does mine too. All you really need to do is multiply the number of stops you want to drop by 0.3 to find the filter you need. So to drop three stops you pick the .9 ND.

And that’s why you need a .9 ND to shoot at T4 when your light meter says f/11. Clear as mud, right? Once you get your head around it, and memorise the f-stops, this all becomes a lot easier than it seems at first glance.

Here are a couple more examples:

  • Light meter reads f/8 and you want to shoot at T5.6. That’s a one stop difference. (5.6 and 8 are right next to each other in the stop series, as you’ll see if you scroll back to the top.) 1 x 0.3 = 0.3 so you should use the .3 ND.
  • Light meter reads f/22 and you want to shoot at T2.8. That’s a six stop difference (scroll back up and count them), and 6 x 0.3 = 1.8, so you need a 1.8 ND filter. If you don’t have one, you need to stack two NDs in your matte box that add up to 1.8, e.g. a 1.2 and a .6.

 

Choosing an ND Filter: f-stops, T-stops and Optical Density

4 Reasons to Use a Light Meter

neiloseman, , ,

lightmeterIn the celluloid era, light meters were essential to ensure proper exposure of the film negative. In today’s digital world, where you can immediately see your images on a monitor, it may seem like light meters are obsolete.

But these devices still have their place in modern cinematography. On a bigger production, when you may not be at the camera the whole time, they can be very useful. Interrupting your ACs (as they set up the sticks, swing the lens, put on the eyepiece extension, balance the fluid head, run cables to the monitors, etc.) in order to see if your image is correctly exposed on camera can be inefficient.

And having the reliable, hard number a light meter gives you can be more reassuring than judging false colours or histograms.

Here are four ways in which I used my brand new light meter on my last production, The Little Mermaid:

  1. To call ND filters. When shooting outdoors, I would take light readings in the sun and in the shade, and when then the sun was in, to understand the range of light levels I was dealing with. I could then pick an ND filter that would put me at a stop at where I would still have the room to adjust the iris a little either way if the light got brighter or darker. This was particularly important when we were shooting on water in a splash bag, when changing NDs or even just adjusting the iris was a longer process. (In my next post I’ll look deeper into stop maths and ND filters to demonstrate exactly how to select an ND filter based on a light reading.)
  2. To measure contrast ratios. The Alexa can handle up to seven stops of over-exposure and eight stops of under-exposure. Knowing this, I could use my meter to see if certain areas were going to blow out or crush, before the camera was even set up. I could also measure how many stops the key side of an actor’s face was above the fill side, and thus work out the key-to-fill ratio. At present this is still something I judge by eye on the monitor, but the more I get to know the numbers, the more I suspect I will start determining it in advance.
  3. To check green-screens are properly lit. The visual effects supervisor, Jafar, told me that green-screens should be exposed at key, or up to half a stop over key. So if I was shooting at T4, I would walk along the green-screen and take readings at various points to make sure the meter was generally giving me between f4 and f4½.
  4. To schedule a dusk shot. For a twilight scene on a beach, I needed to know in advance exactly what our window of opportunity was. Looking up the sunset time is all well and good, but it doesn’t help you figure out how long afterwards there will be enough ambient light left to shoot with. So while at location the day before, I went out onto the beach and took light readings every few minutes after sundown. These told me I had 20 minutes from sunset until the ambient light dropped below what the lenses could expose.

Do you use a light meter? And if so, how?

4 Reasons to Use a Light Meter

Learning from the Masters: “Raiders of the Lost Ark”

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I’m doing a project right now that has a scene where three characters board a boat, and due to the tight schedule we want to cover it in a single shot. A reference that immediately came to mind is the shot at the end of Raiders of the Lost Ark’s second act (1hr30) in which Indy and Marion say goodbye Sallah and board the ship.

The more I studied this shot, the more I realised how utterly masterful its direction and cinematography are, so much so that I felt compelled to write this blog post about it.

Raiders_boat_scene small

It was initially memorable for me because of the skill with which the talent and camera were blocked to pull off the scene in one shot. The camerawork is fairly simple: it dollies left with the characters, settles for most of the scene, then dollies back to the right at the end as Sallah walks off. The varied blocking of the actors keeps the shot interesting during the middle section. I love how Sallah’s delighted reaction at the end is captured in the same shot, by the simple expedient of having him turn to camera. Doing this must have saved hours on lighting a reverse shot that a lesser director might have insisted on.

But what I love most about the shot now is the elegance, simplicity and beauty of the lighting, which demonstrates a number of key cinematography principals:

  1. Using brightness to delineate depth – i.e. a bright background and a darker foreground.
  2. Colour contrast – a cool moonlight from one side and a warm source (presumably representing a streetlamp) from the other.
  3. Cross-backlighting – both sources are on the opposite side of the talent to the camera, giving the maximum shape to their faces, giving them beautiful profiles and retaining depth by keeping the camera side in darkness.

And all of this is achieved by two lamps:

  1. A large daylight source way in the background, off frame right, lighting up the smoke (to supply the bright background), raking the side of the ship and edging the camera-right side of the talent.
  2. A smaller tungsten source off frame left, edging the camera-left side of the talent.

Douglas_Slocombe_BSCineThere are some practicals in the background too, but 99% of the work is done by those two sources. To me, that’s absolute bloody genius.

Sadly Raiders’ DP, the legendary Douglas Slocombe OBE, BSC, ASC, passed away in February, but his exquisite work lives on.

Learning from the Masters: “Raiders of the Lost Ark”

Lensing Ren – episode 5

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Season one of Ren: The Girl with the Mark has come to an end, and to ease the pain a little, here’s one last video breakdown of the show’s cinematography. This week I talk about the exterior scenes from daylight through sunset to night.

Here is the lighting plan for the final scene:

Village-night-1080p

Check out the article I wrote during the shoot about the sunset scene if you’re still hungry for details. And here is an unpublished blog post I wrote during the shoot about the village night exteriors…

The 2.5K HMI backlight
The 2.5K HMI backlight. The dimmer board for the Cyclotron can be seen in the lower right.

The last two days of principal photography on Ren were actually night shoots. It was great to take the village set that I’d shot in natural light for five weeks and chuck some of my own light at it.

In his American Cinematographer interview about The Monuments Men (February 2014), Phedon Papamichael said, “My big night-exterior lighting setups usually have one source” – often a backlight, judging by the examples given in the article – “and then I use whatever practicals are in the shot.” My approach is much the same, though a big source for me is a 2.5K HMI, not an Arri T12, sadly!

One of the Urban Sodium-gelled 800W Arrilites beefing up the braziers
One of the Urban Sodium-gelled 800W Arrilites beefing up the braziers

I knew our key shot was going to be Ren’s POV looking up the street to the Kah’Nath Master flanked by several archers, with Karn and Baynon in the background. I set up my 2.5K dead in the back of the shot, its stand hidden by the furthest house facade.

Another of the Urban Sodium-gelled 800W Arrilites beefing up the braziers
One of the Urban Sodium-gelled 800W Arrilites beefing up the braziers

The plan was for the archers to light their arrows from two braziers, one either side of the street, so Chris Dane and Amanda Stekly dressed these in accordingly. I set up an Arrilite 800 near each one, choosing Urban Sodium gel to give the “firelight” a grungy colour appropriate to the bad guys. (I was shooting on a tungsten white balance to turn the HMI moonlight blue.)

The dimmers controlling the Arrilites
The dimmers controlling the Arrilites

Chris – by this time well-attuned to my lighting needs – also rigged a third brazier to act as the key light for himself (Karn) and James Malpas (Baynon), towards the back of the set. The Arrilite for this one I gelled with full CTO for a yellower, friendlier colour.

All three Arrilites were run through in-line dimmers, and various bystanders were co-opted to flicker them throughout the evening.

Bulbs
The Cyclotron

I rigged a Cyclotron behind the window of the background house – four 100W bulbs under a sheet of CTO, wired to Colin’s dimmer board so they too could be flickered, suggesting firelight inside the house.

The Celotex bounce board
The Celotex bounce board

I figured that the front of this house would still be very dark, being out of range of the Arrilites and facing away from the HMI, so I had gaffer Richard Roberts rig a Celotex board to bounce some of the HMI light back onto it. As it turned out, when it got dark and we fired everything up, there was lots of bounce off the set pieces closest to the HMI anyway. This was a nice bonus that gave us more options when blocking Karn and Baynon’s actions, without having to set up extra lamps.

A sunset view of the lighting set-up from roughly the master camera position. The LED panel on the right was used only as a work light.
A sunset view of the lighting set-up from roughly the master camera position. The LED panel on the left was used only as a work light.

When the braziers were lit and the Master and soldiers strode onto the set in their awesome costumes (courtesy of Miriam Spring Davies and stand-in wardrobe supervisor Claire Finn), we all felt we had a truly epic sequence in the can.

Ren archers

If you’ve missed any of Lensing Ren or Ren itself, here’s a playlist featuring every episode of the fantasy series, interspersed with the corresponding cinematography breakdowns:

Lensing Ren – episode 5

Lensing Ren – episode 4

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On Tuesday the penultimate episode of Ren: The Girl with the Mark was released and so here’s my video breaking down the cinematography of that fourth episode. This week I cover lighting the guardroom and the prison cell, and demonstrate cross-backlighting.

Here are the lighting plans for the guardroom and the cell:

Guard-room-1080p Cell-1080p

You may also be interested to read the blog I wrote during the shoot about Lighting the Prison Cell, and my post explaining the technique of Cross-backlighting. And here is an unpublished post I wrote during the shoot about the guardroom….

33_GuardRoomWide1

The guard room shoot came at the end of a long and intense week of shooting interiors. By Sunday most of the lead actors had left, we had crested the hill and the end of principal photography was in sight. The atmosphere was even more relaxed and informal than usual, particularly as everyone’s favourite spouter of inappropriate comments, Richard “Squish” Roberts, was playing the lead jailor.

A behind-the-scenes view of the lighting set-up for the window and swords
A behind-the-scenes view of the lighting set-up for the window and swords

Ren’s bedroom had been repainted and redressed to be the Kah’Nath guard room. This meant a single, small window again, and as usual I couldn’t resist blasting a 2.5K HMI through there for a shaft of hot, smoky sunlight.

The Window Wrap in action on the swords
The Window Wrap in action on the swords

I wanted to highlight the rack of swords next to the window, which the shaft of light wasn’t catching, so I used a variant on my Window Wrap technique. I put a 2′ 4-bank kinoflo outside the window at such an angle as to light up the swords without blocking any of the HMI light.

I was interested to find that the art team had done something a bit different with the room’s candles, hanging a cluster of them from an overhead beam. I asked for the “table” (actually a barrel) – where the guards would be playing a board game – to be placed directly under that.

The Dedos (left and right of the picture) and 100W globes used to enhance the light from the candles
The Dedos (left and right of the picture) and 100W globes used to enhance the light from the candles

The candles wouldn’t shed light directly down on the game in the classic single-light-source-coming-straight-down-onto-the-poker-table style, but I felt it would give me an excuse to cross-backlight. I clamped a Dedo to the top of each side of the set, each one spotted on one of the two characters who would face each other across the barrel.

A view of the finished lighting set-up from over the dimmer boards
A view of the finished lighting set-up from over the dimmer boards. On the floor to the right can be seen the shaft of light from the LED fresnel coming through the fake door (off right).

These Dedos couldn’t be flickered, being the kind which go into a single control box with only three discreet settings for brightness. So to introduce some dynamics, and soften the light a bit, I clipped a dimmable 100W bulb to either side of the beam from which the candles hung. This would also ensure that Hunter would be lit when he stood next to the barrel.

An additional light source in the set was a small brazier on the wall next to the dungeon door. This seemed bright enough to shed plenty of light by itself, particularly as Squish would be standing right next to it for a large part of the scene.

The final touch for lighting was to re-use the fake door to create the effect of daylight spilling in as characters exited and entered from off camera. This time I placed an LED fresnel behind it.

41_GuardsHunter

Check back next Saturday for another instalment of Lensing Ren, and meanwhile watch the next episode of Ren itself from Tuesday at 8pm GMT at rentheseries.com

Lensing Ren – episode 4