Time and photography

So I am looking at this photography thing and seeing that it is all about time and speed, or more to the point in a very physics sort of way, the speed of light. Color is measured in temperatures and the temperatures are different wave forms of light, they take different amounts of time to travel from peek to peek relative to the observer.

I love fast lenses, a lens that does not slow the light down as it enters the camera, making the picture dark. Although light does not slow down, it just passes you by.You can take a slow lens and speed it up by speeding up the camera, or adding light by using the flash. Basically filling in the missing light or making the available light more powerful.

All right you might be saying to yourself, sounds reasonable but look at how the science interacts with the art. It is like cooking, what is the recipe for the shot and it includes all the camera data, distance data, lighting data, time of day, and disposition of your subject. You can copy many but never really copy all to get a identical shot. Each one is unique.

Try this, set your camera to the ambient light in a room with no one in it, then put someone in front of it with the camera in manual mode with the variables from the exposure metering and compensate the exposure up three to four stops and pop up the flash, and compensate the flash down like 5 stops. (Sounds like you are beating a dead horse) but the fun thing is that while doing this and if you can set your flash to rear curtain sync you wind up with the subject having the same relative luminosity of the scene. Cool eh?How about using colored filters over your flash to ad a cast to the light and then set your white balance to something else, let’s say a little blue to make it cold or green perhaps. How would that come out?

Just remember that kelvin is often used in the measure of the color temperature of light sources. Color temperature is based upon the principle that a black body radiator emits light whose color depends on the temperature of the radiator. Black bodies with temperatures below about 4000 K appear reddish whereas those above about 7500 K appear bluish. Color temperature is important in the fields of image projection and photography where a color temperature of approximately 5500 K is required to match “daylight” film emulsions. In astronomy, the stellar classification of stars and their place on the Hertzsprung-Russell diagram are based, in part, upon their surface temperature, known as effective temperature. The photosphere of the Sun, for instance, has an effective temperature of 5778 K.