What is the primary use of a polarizing filter in commercial photography?

• A. To reduce reflections and glare from non-metallic surfaces and to enhance color saturation on glossy subjects.
• B. To increase depth of field.
• C. To speed up shutter.
• D. To convert color to black and white.

Answer: (A)

A polarizing filter works by filtering light that becomes polarized when it reflects off surfaces. By rotating the filter to the right angle, you block much of that polarized glare from non-metallic surfaces like glass, water, or glossy paint, so reflections are reduced and colors underneath appear deeper and more saturated. In commercial photography this is highly useful for product shots or scenes with shiny surfaces, where you want the material’s true color and texture to come through without distracting glare. It can also enhance contrast in the sky and foliage when appropriate. It doesn’t change depth of field, speed up the shutter, or convert a color image to black and white, which are effects handled by aperture, exposure, or processing rather than polarization.