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| p.2 #13 · New Zeiss Distagon 55mm f/1.4 ZE lens at Photokina |
My question is... why retrofocus?
Is this a scaled-down 6x6 ex-Hassleblad design with a massive image circle to avoid the double-gauss MTF doughtnut dip in the periphery? If so, is that 82mm front necessary to get enough light to hit 1.4 (see, e.g., 24/1.4 designs -- but no 6x6 (or 645 for that matter) lens ever hit f1.4.)
Why no Cosina-style metal focusing ring? Does the wide rubber grip make it amenable to attaching a focus pulling rig?
What a curious lens...
I don't understand much about lens design, but aren't retrofocus lenses worse at fast stops, particularly in the corners? Isn't there more distortion? And isn't fall-off kind of a non-issue with a lens like this? This is strange since I always assumed that the advantage of rangefinders was their ability to use non-retrofocus wides and yet this high end lens comes out.... But then again Zeiss' fast 35mm is better than their fast 50mm....so will this simply bring the 50mm up to 35mm standards?
Also, this is a strange focal length to make premium. The 15mm f2.8 makes more sense to me since at least it's wacky and unique.