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| p.1 #9 · Distagon 28mm f2 C/Y or Distagon 28mm f2 ZE/ZF? |
I don't understand why Leitax would make a difference. Presumably the mirror interference is only a function of lens position, which must be the same for proper infinity achievement.
Of course, having a Leitax mount won't make an otherwise uncompatible lens into a compatible lens, but I would like to give two thumbs to Leitax, anyway.
In my experience, the Leitax mount has the most accurate geometry of any common mount conversions, including generic, Fotodiox, and Fotodiox Pro. The main advantage offered by the more accurate Leitax mount is to eliminate asymmetry that often results in left/right or top/bottom differences in sharpness. I now have Leitax mounts on my Distagon 28/2.8, Sonnar 100/3.5, Vario-Sonnar 35-70/3.4, and Vario-Sonnar T* 100-300/4.5-5.6. They all perform noticeably better (in some cases, only slightly) with Leitax than with other adapters, and the heavier 100-300mm lens has a much more secure mount with Leitax than a simple adapter could provide. Same for my Oly 21/3.5, and 24/2.8 lenses. I'll probably get Leitax for the Oly 85/2 that's on the way to me, if it's a good copy.
I haven't tried the top-of-the-line Novoflex adapters, except to play with one on a Summircon-R 90/2 a few years ago at Camera West. It had a super tight fit but they're more expensive than Leitax, and I don't see how they could be better - except that an adapter can be used for more than one lens; unless you're like me, and want one per Alt.