Tuesday, 13 December 2011

DIY lighting


DIY Lighting

I found this article giving us tips on DIY lighting which we will need as we are doing some outdoor scenes.




Professional lighting kits for video and photography are very expensive. Fortunately for the budget-impaired enthusiast, it is possible to put together a perfectly adequate lighting kit for less than £100
A good beginner's lighting kit should include:
  • Three (or more) lights with stands
  • Reflector board(s)
  • Power cables, extension leads and a multi-box.

The Lights

The standard budget light is the halogen work lamp which can be found at any hardware store or purchased at amazon.com for as little as $US10. These come with or without a stand and range from around 150W to 500W.
The stand-less units have a small handle and can be rested on any solid surface such as a table or the floor. This is not ideal for your main lights but it can be useful for fill lighting, backgrounds, etc. In any case these units are so cheap that it can't hurt to buy a couple.
Lights with stands are more versatile and you should have at least one of these (preferably two or three). Try to find a stand which goes up to around 2 metres (the height of a tall person). Taller than 2 metres would be even better but this type of light stand doesn't normally go that high.
Some lights (like the W12665 unit pictured) can be used with or without the stand, making them even more versatile.
One drawback of these cheap lights is that the colour of the light is quite yellow. As long as you white-balance your camera this isn't a huge issue, but if you want the best quality lighting you can try one of these solutions:
  1. Purchase a 32K white bulb (ask your hardware supplier).
  2. Place a coloured gel in front of the light to correct the colour.
Speaking of gels, the other big drawback of these lights is that there is no built-in system for mounting accessories like gels and diffusers. You can improvise by creating a wire holder or separate stand for accessories.
You will also find that you can't alter the spread of these lights, i.e. from floodlight to spotlight. This is not a big concern for most people but if you do need this functionality you might need to consider a professional video lighting kit.

Reflectors

Car SunshadeProfessional reflector boards are used to add or control light in a scene. You can make your own from just about any large reflective object, although the exact colour and reflectivity will obviously affect your lighting. Common suggestions for an improvised reflector include:
  • Windshield sunshade (pictured)
  • Sheet of foamcore
  • Polystyrene sheet
  • Stiff cardboard, or tin foil on cardboard (try both sides of the foil for different effects)
  • Whiteboard
  • Survival blanket (gold on one side and silver on the other)
Hobby shops have a lot of items which may be of interest. Online auction sites are also worth checking as reflectors can often be found fairly cheap there.

Power

You will need a few power extension cables of varying lengths, plus one or more multi-boxes with built-in trip switches. It helps to have a separate carry case for power cables.

Safety

  • Lights get very hot! Seriously, you can burn yourself badly or set fire to things.
  • Lights can draw a lot of current so be careful not to overload power sources.
  • If you're working outside, use an isolating transformer on your power.

Keyboard Shortcuts FCPx (Very Useful)

This video gives an overview of all the shortcuts within Final Cut Pro x which will help us navigate the software more effectively. Which will be useful for when we are editing our final project.

Some Lighting Terms


Ambient LightThe light already present in a scene, before any additional lighting is added.

Incident LightLight seen directly from a light source (lamp, sun, etc).
Reflected LightLight seen after having bounced off a surface.
Colour TemperatureA standard of measuring the characteristics of light, measured in kelvins.

Contrast RatioThe difference in brightness between the brightest white and the darkest black within an image.

Key LightThe main light on the subject, providing most of the illumination and contrast.

Fill LightA light placed to the side of the subject to fill out shadows and balance the key light.

Back LightA light placed at the rear of a subject to light from behind.

Hard LightLight directly from a source such as the sun, traveling undisturbed onto the subject being lit.
Soft LightLight which appears to "wrap around" the subject to some degree. Produces less shadows or softer shadows.
SpotA controlled, narrowly-focused beam of light.
FloodA broad beam of light, less directional and intense than a spot.
TungstenLight from an ordinary light bulb containing a thin coiled tungsten wire that becomes incandescent (emits light) when an electric current is passed along it. Tungsten colour temperature is around 2800K to 3400K. Also known as incandescent light.
HalogenType of lamp in which a tungsten filament is sealed in a clear capsule filled with a halogen gas.
FresnelA light which has a lens with raised circular ridges on its outer surface. The fresnel lens is used to focus the light beam.
IncandescentIncandescent lamps produce heat by heating a wire filament until it glows. The glow is caused by the filament's resistance to the current and is calledincandescence.

Lighting

The intensity, direction, and quality of lighting have a profound effect on the way an image is perceived. Light (and shade) can emphasise texture, shape, distance, mood, time of day or night, season, glamour; it affects the way colors are rendered, both in terms of hue and depth, and can focus attention on particular elements of the composition. We feel that lighting will be a challenge within our production which is why we have hired a specialist light technician to set up the lighting within our set, this will make it more realistic and effective, but if any problems do arise post filming i feel colour correction will be a very effective tool for us to use and below is a tutorial of how it works and a step by step guide to using it.

Camera effects





This video will give us help with one of our most important scenes. We are trying to create the effect that our actor is intoxicated using a distorted effect. This video contains tips to try and develop this scene.


James

Markers Final Cut Pro x



Because James and i are working on the project together and often at different times, markers within final cut pro x will help us to keep track of our progress and highlight editing that needs to be completed, i feel markers are very useful tools and will help us to keep on track with our schedule and meet deadlines effectively