Your 50/1.4 sounds much like mine. There must be something seriously wrong with your 28/2.8 because, as I am sure you know, it should be a pretty sharp lens. I have two of them (the second was a mistake, but it was bought from a charity shop, so I never returned it) and they are good.
Yeah I\'m in disassembly now. Interesting little lens - tiny elements and groups basically sandwiched on top of one another...I thought everything was cemented together until I got out my rocket blower to clean an element and it came flying out!
I reversed what looks like a 2-element group, thinking maybe it was inserted wrongly (it looks and feels almost symmetrical) but that didn\'t help.
Also note - lens only looks crazy at f/2.8, it sharpens up pretty well but yeah at f/2.8 it\'s zany
edit -- So I grow a brain and decide to look at MIR\'s element layout for the lens and find the problem -- lens is missing an element! One can see someone has disassembled this before and I believe they lost (or forgot) to replace the third element from the rear
Your 50/1.4 sounds much like mine. There must be something seriously wrong with your 28/2.8 because, as I am sure you know, it should be a pretty sharp lens. I have two of them (the second was a mistake, but it was bought from a charity shop, so I never returned it) and they are good.
Yeah I\'m in disassembly now. Interesting little lens - tiny elements and groups basically sandwiched on top of one another...I thought everything was cemented together until I got out my rocket blower to clean an element and it came flying out!
I reversed what looks like a 2-element group, thinking maybe it was inserted wrongly (it looks and feels almost symmetrical) but that didn\'t help.
Also note - lens only looks crazy at f/2.8, it sharpens up pretty well but yeah at f/2.8 it\'s zany
Jan 24, 2016 at 02:15 PM
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