Tag: cinematography

A beginners guide to lighting gels

Gels are used by cinematographers and videographers to balance the colour of light sources, adjust contrast and control shadows. It is the use of these gels that helps to create certain moods and looks to productions, whether that be low key drama or high key corporate video.

If you don’t know your ND from your CTB then read on as I introduce some of the most popular lighting gels and demonstrate how they may be used in your productions for creative effect.

CTB

CTB (not to be confused with CBT!) stands for colour temperature blue and is often referred to simply as ‘daylight’. It is used to convert tungsten balanced light sources such as traditional household bulbs and fresnels from 3200K to 5600K. It’s a common gel for balancing artificial light sources to daylight when the sun is acting as the key light in a scene.

With our camera balanced to daylight and using a tungsten light source, our professional model looks like he should be in TOWIE..

5200K_FULL_DAYLIGHT_GEL

..so by applying FULL CTB the skin tone looks a bit more natural now.

5200K_HALF_DAYLIGHT_GEL

If your subject has a lighter skin tone or if your camera’s auto white balance reads around the 4500K mark (for some fluorescent lighting), you may want something in the middle between tungsten and daylight and HALF CTB may be your answer, converting tungsten sources to 4300K. In this shot the camera is still balanced to daylight.

  • CTO

Another popular colour correction gel is CTO which stands for colour temperature orange and is often simply referred to as ‘Tungsten’. It is used to convert daylight 5600K sources to 3200K, in line with the colour temperature of most traditional household lamps.

3200K_NO_TUNGSTEN_GEL

Using a daylight balanced LED light and with the camera balanced to tungsten, our image is looking a bit cold. But there is a use for this though; it is a popular method of simulating moonlight as well as shooting ‘day for night’.

3200K_FULL_CTO_GEL

But if moonlight isn’t what you’re after, FULL CTO will return the skin tone back to a more natural colour.

3200K_HALF_CTO_GEL

HALF CTO converts 5200K to 3800K, so a little cooler than FULL CTO but not too far off. With the light I’m using (dedolight ledzilla) and the model’s skin tone in this case HALF CTO actually looks a little nicer.

Both CTB and CTO also come in other strengths including QUARTER and EIGHTH, for those more subtle differences, but FULL and HALF are the most widely used.

  • ND

ND stands for neutral density and is used to reduce the amount of light without altering the colour. ND is often used on the camera in filter form but for lighting it can be invaluable in helping to control exposure and contrast. Using ND to reduce powerful light sources that do not have dimmers (or if you don’t want to change the colour temperature of the source through dimming) or stopping natural light from washing a scene out through covering windows with these gels, it is an incredibly useful tool.

NO ND

Oh no, you can see that I forgot to iron my backdrop..so in this shot as you can see our model is looking a bit ghostly. Time to crack out the ND.

1 STOP ND

ND.3 reduces the light by 1 stop.

ND.6 reduces the light by 2 stops.

ND.6 reduces the light by 2 stops.

And ND.9 reduces the light by 3 stops.

And ND.9 reduces the light by 3 stops.

Wise words a gaffer once said to me, “you can never have enough ND!”

  • Diffusion

Diffusion is used to control the softness of shadows and the softer the source the less prominent the shadows will be. As hard lights have typically much higher output than soft lights, diffusion is key to softening these sources whilst utilising a strong beam.

There are so many different types of diffusion available and it can be difficult to know where to start so here are a few examples to give you an idea of the range available. At the end of the day it’s down to you to experiment with various types and find what you like.

NO_DIFF

Our professional hand model is currently being lit with a hard LED source (Dedolight Ledzilla) and no diffusion.

HAMPSHIRE_FROST

This diffusion used here is HAMPSHIRE FROST. Notice a subtle softening of the shadow.

 

 

 

 

 

 

 

 

 

 

HEAVY_DIFF

HEAVY DIFFUSION is being used here (and it’s easy to see why it got this name)

CLOTH1

I don’t actually know what this diffusion is called but it somehow found its way into my kit. A thicker, rougher sheet that is a little closer to greaseproof paper. As you can see it has a lovely texture to it and can add a bit of spice to a background.

 

 

 

 

 

 

 

 

 

 

It’s important to note too that the further a piece of diffusion is away from a light source, the softer the shadows will be, as will be a slight reduction in overall output of the light. See the example below:

HALF DIFFUSION attached to the light..

HALF DIFFUSION attached to the light..

HALF_DIFF_FURTHER_AWAY

..and the HALF DIFFUSION moved away from the light source (closer to the subject). Notice how much softer the shadow is now.

 

 

 

 

 

 

 

 

 

  • “Party” gels

Not necessarily an official term but in this case I shall refer to most other coloured gels as ‘party gels’. Whilst these may not be as important for most shoots as the colour correction and other gels mentioned above, they can be used to create certain moods for your scenes whether they are used as key lights, backlights or kickers. There are an almost endless number of these gels to choose from but here are a couple of examples.

3200K_STEEL_GREEN

STEEL GREEN with the camera balanced to tungsten. Sci fi!

STEEL GREEN but with the camera balanced to daylight.

STEEL GREEN but with the camera balanced to daylight. Lord of the Rings or Matrix?

 

 

 

 

 

 

3200K_STRAW

More subtle than the above, a STRAW lighting gel with the camera balanced to tungsten. A nice morning light look.

5600K_STRAW

A STRAW gel but with the camera balanced to daylight. I’m getting a CSI Miami vibe here.

 

 

 

 

 

 

 

 

 

 

 

So, which gels should you buy?

It all starts with the light source(s) that you’ll be using most. Their colour temperature, power, whether they are dimmable and how hard or soft they are will all determine the gels you need. Aspiring DOPs will probably accumulate gels over time as their portfolio grows, but a good place to start is with the simple colour correction gels (CTO and/or CTB) and some diffusion which are the bare bones for lighting anything professionally. Another thing, don’t always rely on kit hire companies to stock a wide range of gels!

Big D Jonny boy

Experimenting is key to finding lighting styles that will grab your audience’s attention.

Use of softbox fill Liquiproof

Part of the fun and the craft of being a DOP is finding lighting styles that fit your productions and consequently help you to create your own signature style. Experiment with gels and see which colour combinations work and which don’t. Get creative!

Whether you are new to lighting or not, the LEE filter comparison tool here is a fantastic resource to see the range of lighting gels available and help you make decisions on what to buy. LEE filters are widely considered the number one name for gels; heat proof, colour accurate and with a huge choice available, they are an essential investment if you’re an aspiring DOP.

Happy shooting!

 

P.S. This post would not have been possible without my trusty light meter. Here are a few reasons why every aspiring DOP simply must have one.

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How to choose the right camera for the job

The C100's form factor and weight made it the perfect choice on a recent trip to Gibraltar

The C100’s form factor and weight made it the perfect choice for a day trip to Gibraltar

I’m terrible at making decisions sometimes. When presented with a multitude of options for anything in life it’s so easy to spend too much time overthinking which options to take that you end up wasting unforgivable amounts of time being indecisive and not actually getting anything done. The process of deciding on a camera to use is one of those tasks that I, and I’m sure many others in this field, have been guilty of in the past for spending far too long on. Many hours can be lost to Youtube comparison videos and the forums if you’re not careful. Sounding familiar? There are so many options available to us that it’s understandable why it would take so long to decide, but time is money after all and we’ll get left behind if we ‘oom’ and ‘ahh’ for too long.

And the award for most expensive wedding video ever goes to..

Lets face it – all of us techies would love to have the latest and greatest cameras for all of our projects. Wouldn’t it be great if we could shoot in 4K or 6K (or even greater) every time? Having the ability to shoot super slow motion on a full frame sensor with internal ND in a lightweight body would be pretty amazing right? Why would anyone want you shooting for them if you don’t have the most up to date technology possible?

We’d better stop dreaming I’m afraid.

Not to rain on the parade or anything but the fact of the matter is we can’t always have the most advanced technology every time. Most of the time this is down to money, but even if you had all of the money in the world to buy however many cameras you’d like, you’d probably reach the same conclusion as me eventually:

No camera is perfect. But, for each job there is a perfect camera. 

Think to yourself what your favourite film is. Why is it your favourite film? Did the choice of camera have anything to do with it?

Probably not.

You probably chose it for its story or maybe the acting. Perhaps you chose it for its cinematography, but remember the camera only did half the work. There was a person operating that camera and they would’ve probably made a conscious decision as to why that camera was the tool for the job in their current situation.

The right camera for the job

It’s very easy to get into the gear mindset and only think specs, but really if you want to be taken seriously as a professional then think of the equipment as merely tools. Cameras are obviously much more exciting than other tools in other industries, but realistically that’s what they are.  You are there to do a job and they are there to help you do that. The camera manufacturers want us to think differently, but then they want our hard earned cash! The key is finding the camera that will help you do your job, whatever it may be, as efficiently and effectively as possible whether you are buying or hiring.

So what is your situation? Do you have a short term brief to meet or a long term investment to consider? If you are stuck choosing a camera, here are some factors to consider before your dreaming becomes a money losing opportunity:

  • Price

The most obvious thing to consider. As with any other product the more features a camera has, the dearer it will be, whether you’re buying or hiring. Set yourself a budget.

  • Return on investment 

If you’re buying it’s sensible to think about how long it will take (or – gulp – if) you’ll make a return on your investment. We’d all like an Arri Alexa, but do we all earn that much in a year? Similarly if you’re shooting on a long project, would it make sense to hire a camera for that period when you could actually save money in the long run by buying?

  • Accessories

What do you actually need to make your camera perform how you want it to? Does it work straight out of the box or are there other bits required? Do these additional items cost much or take long to set up? Will these accessories remain useful if you decide to upgrade further down the line? Have you thought about which lenses you’re going to use? (that’s an entirely different subject in itself)

  • Target audience

Crucial, this one. What do you actually shoot? What are your clients asking for? Do you want to move into shooting something different? An Arri Alexa is probably going to be a bit overwhelming for talking heads!

  • Workflow

How quickly do your clients need their video? Do you need to shoot with edit friendly codecs for speed? Or do you require something more efficient for storage? Can your editing system handle 4K or do you plan to upgrade in the future? Do you need flexibility in the grade?

  • Image

It would be lovely to not have to worry about this but unfortunately in the world of business first impressions are made very quickly and this can mean the difference between landing a job or not. Whilst this is mostly attributed to personality, punctuality and presentation, the same can also be applied to the equipment you use. If your clients think you’re using cheap equipment are they likely to pay top dollar? If you shoot on a DSLR have you ever had someone ask you ‘Are you doing stills?’. What impression do you want to leave?

  • Style

OK, so we’re allowed to have a little bit of fun while we’re selecting our tools. Every camera out there has a distinct look and processes colours and skin tone slightly differently from the next. You might just simply prefer the look of one over the other, regardless of specs. Try some cameras out and see what you like. Are you Canon or Sony? Black Magic or Red?

Sony or Canon?

Are you Sony or Canon?

As you can see there is a lot to consider when choosing a camera and we would all want to know that we are making the right choice. Lets look at some examples, in this case some up to date 4K cameras, and think about when they could be used as effective tools and when they may just be a big fat waste of money:

Arri Amira

arri amiraEveryone knows that Arri is king when it comes to cameras, as was evident when cinematographer Roger Deakins commented that the Alexa was the first digital cinema camera to challenge 35mm film.

The Amira is essentially a slimmed down ‘documentary’ style version of the Alexa. With HD, 2K and 4K options, a range of Pro Res codecs, slow motion up to 200 fps, internal ND, interchangeable lenses and huge dynamic range, this camera really has everything I would love to have in a camera. Most importantly, the images it produces are superb. I mean they would have to be as this camera retails at over £20,000. Would probably be hiring this one me thinks.

20151020_093951

I was fortunate enough to spend some time recently with the Amira. An incredible camera but with the weight of accessories you might think twice about shooting on it entirely handheld.

Best for:

  • Broadcast and high end drama, documentary, commercial etc.

Worst for:

  • Event work and majority of online output (impractical and uneconomical)

 

 

 

Black Magic Cinema Camera

blackmagic_design_blackmagic_production_camera_4k_964119From my experience Black Magic seem to be a bit like marmite. Most people seem to either love them or hate them – there’s no in between. Why’s that? To start with, the specs for their production camera are very good with lots of frame rate options, huge dynamic range and popular lens mount options all within a small body. What’s more it comes at an unbelievable price for a 4K camera at just over £2000 currently. Where it falls short however is in its battery life, impractical screen and ergonomics. It sounds tempting but if you decide to invest in some accessories for it then suddenly it’s not so cheap.

BMPC: Ideal size and weight for a car rig.

BMPC: The ideal size and weight for a car rig.

Best for:

  • Low budget drama, commercials and music videos or 4K on a budget

Worst for:

  • Anytime you have to shoot quickly, as a lone shooter or in low light, i.e. documentaries & travel (impractical)

Sony A7S mkii

sony a7s iiThe A7S took the DSLR world by storm last year mostly due to its incredible low light capabilities attributed to its full frame sensor and it’s affordable price tag. Now the mkii is here and whereas previously you could only record 4K footage to an external recorder this new version offers internal 4K recording as well as some other nice features including frame rates up to 120fps and several variations of S-Log for greater dynamic range in the grade. At £2500 it is certainly an affordable 4K camera, but it may not be for everyone. As a DSLR it still lacks some features associated with professional video cameras including XLR inputs and is limited to recording no longer than 30 minutes. Its battery life is also not great and the Sony E mount offers far fewer lens options than EF or PL for example. If you decide to invest in accessories, then once again, it may not actually seem that cheap after all.

Best for:

  • Travel

Worst for:

  • Conferences, weddings and other long recordings (impractical)

C300 mkii 

canon_0635c002_eos_c300_mark_ii_1134579

A recent offering from Canon, the C300 mkii builds upon the success of the original C300 which became a widely recognised video production workhorse. The original camera was popular for broadcast, news gathering and corporate work and the C300 mkii looks set to improve on this build with new codecs and frame rates on offer, 4K recording, inbuilt ND, popular lens mount options and a form factor that makes it ideal for shooting as a single operator. But with only being able to shoot 4K at 30p, a heavier build than the previous model and a price tag far higher than the spec-tacular Sony FS7 (which is in the same league but does offer slow motion in 4K) this camera may be too much for some at £13500.

Best for:

  • Broadcast and online (anything that requires a single operator)

Worst for:

  • 4K slow motion requirements (non existent)
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The original C300 has dropped in price substantially since the mark ii release. Great if you don’t need 4K.

These are just a few examples to get you thinking and of course these are my own opinions, but as you can see it’s a bit of a minefield out there. There are so many factors to consider and what one person needs in a camera may be unnecessary for another. It also doesn’t help that new cameras are being thrown at us left, right and centre all the time and the old models are becoming obsolete quicker than ever (which hurts us financially for sure!). The plus side of this camera boom however is there are so many options available that there is something for every budget, whether you shoot HD or 4K.

Get what you need and concentrate on producing high quality work – remember it’s not just about the equipment but the people and the creativity behind it.

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