Is there any material difference between Cokin and Lee filter systems? I'm looking for a limited range of filters - ND, Grad ND and Polariser - for use with a Sigma 10-20 Wide angle lens on a Nikon ...
I've been wanting to add a wide angle lens to my collection for a while now. Sigma 10-20mm f5.6 looks good. I was looking at it about 2 years ago. I was wondering if there have been newer wide angle ...
What is the point at which a lens is considered "ultra-wide angle" vs just wide angle?