Neutral Density Filters Thursday, February 21st, 2008

Sometimes when you’re shooting in broad daylight you may have a reason to use a longer exposure than you can achieve from your smallest aperture and lowest ISO setting. That’s where neutral density (or ND) filters come in.
ND filters have been widely written about, so I don’t intend to flog a dead horse here. Still, while shopping for ND filters today, I realized that this whole numerical rating system they use is kind of confusing, and I always wondered why some manufacturers will say ND.3, while others simply write 0.3, and yet others come out and plainly state “one stop.”
I personally prefer that everything be expressed in stops, but since that isn’t often the case, here’s my explanation… After the jump. (more…)