I have a B&W 3 stop and a B&W 6 stop grad filters, my silly question is, is the 3 stop a ND 3 and the 6 stop a ND 6, if not could someone please let me know what the are.
Hi Graeme,
I always thought a ND3 is a one-stop filter, a ND6 is a two-stop filter (because cameras tend to go up in 1/3 stop intervals). So ND4 = 1.33 stops, ND5 = 1.66 stops, etc. Using my presumption, a 3-stop filter would be ND9 and 6-stop filter would be ND18!
I'm no expert so maybe someone can correct me on that...
Ged
____________
Ged McMahon
Canon 5DMk3 | Canon 50D | 24-70L f/2.8 | 70-200L f/4 IS | 18-200mm go anywhere | 50mm f/1.8 | 100mm macro | 10-22mm f/3.5-4.5 | 580EX II Speedlight | Some strobes and stuff
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You sure they aren't GRAD ND .3 (1 Stop) and .6 (2 stop) filters?
A 3 Stop Filter is a ND .9 and a 6 Stop Filter is a ND 1.8, which they make in ND's, but not sure about Grads?
Last edited by mercho; 03-05-2011 at 10:03pm.
mercho no they are nd's, that's for your input