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Old 11-12-2008   #69
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jonmanjiro is offline
Join Date: Feb 2007
Location: Yokohama
Posts: 5,317
The 5cm f1.4 is a Sonnar optical design and a lot more compact than the 50mm f1.4 which is a Gaussian optical design. The 5cm/1.4 has good central sharpness even wide open, but the later 50mm/1.4 is a better performer, especially out in the corners. The 5cm/1.4 can show flare fairly easily, but its almost impossible to make the Millennium 50mm/1.4 flare. I haven't succeeded yet. No doubt the modern multi-coating helps with that. See pics below:

Millennium 50mm f1.4 on the left, 5cm f1.4 is in the middle

Last edited by jonmanjiro : 11-12-2008 at 22:04.
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