I'm looking to rent a lens for a backpacking trip this summer in the Sierras and was looking at the Zeiss ZE 21mm f/2.8 would you go with the Zeiss 21 or Canon 24. Manual focus isn't an issue.
def zeiss 21mm IF it's not too wide for you and you don't mind loss of AF or f/1.4
24mm does more (AF,f/1.4, not crazy wide) but the zeiss has some insane beyond insane micro-contrast, people go much to much on about zeiss 3D magic and all that (my canon 50mm 1.4 looked no different to me than the zeiss 50 1.4 i tried and and so on) BUT for a very few of their lenses they do seem to have something special and this 21mm of theirs is one
depending waht you shoot the canon 24 T&S II might be even better, but only if you will make use of the tilts and shifts