03-05-2014 08:45 PM
03-05-2014 10:26 PM
03-06-2014 09:18 AM
For most of portrait or street photography, I use 3 stop more. For landscapes, I use 10 stop more. You can buy vari-ND if you have the $ for it.
We should probably add... using a 10 stop filter is often to allow for a long enough shutter exposure time to create intentional blur on moving elements in the scene (commonly flowing water.)
03-06-2014 08:37 PM
What lens do you have? If you are taking still shots, I'm sort of wondering why you need an ND filter at all.
Set ISO 100 on your camera and you should be able to use f2.8 and 1/3200 shutter speed, on the brightest sunny day. If you have one of the kit zooms, about the larget aperture is f3.5 at the wide end, f5.6 at the tele end, and you could use 1/2500 and 1/800 shutter speeds with those, respectively.
If shooting video, well, yeah you might need a strong ND filter due to frame rate and ISO limitations.