Quote Originally Posted by illumiquest View Post
If a 4000$ Leica 21mm isn't better than a 650$ Nikon 20mm...
It's not so much the price rather the design and there's no way of matching the quality of a pure wide angle lens with a retro focus SLR WA design.

A better example although MF not 35mm would be a comparison of the 38mm Biogon on the Hassleblad SWC with the 40mm Distagon for the regular Hasselblads.