"William Robb" <[EMAIL PROTECTED]> wrote: >ND filters are used to trim light levels so that specific >aperture/shutter speed combinations can be used. If you want to >shoot at (as an example) f/8 at 1/60th, no matter what the light >level, then an ND filter set will be essential.
Now *there's* an interesting concept that might find an application in a digital camera: Instead of choosing your aperture and having the camera set the shutter speed or choosing your shutter speed and having the camera set the aperture, you would set both the shutter speed AND the aperture...and the camera would vary the "film" speed to get the correct exposure. Goodbye ND filters. -- Mark Roberts Photography and writing www.robertstech.com
