.Light Sources - Photography | Chroma Key Software Light Sources – Photography

postheadericon Light Sources – Photography

Among the variety of light sources used in photography, the artificial lighting found in houses, offices, city streets, and public spaces is often considered to be the poor relation. Daylight is purpose-built and so designed for camera and lens settings that are close to ideal. What remains, generally known as available, ambient, or existing lighting, can be problematic, but may also be interesting.

 

Available light used to be at best a challenge, with a great deal of built-in uncertainty. Available light levels are lower than ideal for use with film, so one of the issues was whether to sacrifice detail by opting for a faster and so grainier emulsion, or accept some movement blue by staying wit a fine-grained emulsion and using a tripod for steadiness. Another issue was color balance, involving first a choice of daylight or tungsten film, and second a choice of filter. This was on top of having a method of judging the color of the lighting; namely  a color meter, experience, or guesswork.

 

Digital photography does away with all of this at a stroke, and available light becomes a pleasure – or at least an arena of lighting situations that is almost as easy on the camera as it is on the eye. This has some very important practical effects, on time and cost. There is almost no need for advance planning and calculation. You can decide in an instant what the color balance is likely to be then choose the appropriate white balance and check the result. If it is not quite right, you can go back to the menu and adjust it. It should take no more than a minute to reach a passable color balance in even the most difficult conditions.

 

And then there is the issue of cost, which affects the number of different shots that photographers attempt. Available light is often patchy, with the light sources themselves frequently in shot, and this encourages bracketing and different filter combinations just to be safe. Or rather, it used to encourage this, but now the immediate view on the LCD screen shows you what adjustments to make. No longer do you need filters, or backup rolls of tungsten and high-speed film, or a second camera body for them. A single digital camera has it all, and this surely takes the pain out of available-light photography.

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