CAMERA

Conversion filters do NOT allow you to _________?

A. alter color temperature of a lighting source to that for which the film is balanced.
B. reduce the amount of light that reaches the film
C. eliminate the blue-green tint caused by fluorescent lights.
D. control to amount of polarized, reflected light that reaches the film.

Color conversion filters are used to color balance of the light reaching the film or imaging detector in photography, so they *do* allow you to do options A and C above.

Because conversion filters work by absorbing some wavelengths of light they do reduce the amount of light reaching the film (option B), but this is not their primary purpose. Normally, one would use a “neutral density” filter for this. Neutral density filters are designed absorb light uniformly across the visible wavelengths of light, so they do not alter the color balance.

Conversion filters do *not* normally affect the polarization state of the light reaching the film, so option D is probably your best answer.

AdoramaTV Behind the Scenes: More on color temperature: Adorama Photography TV

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