farnz Posted December 27, 2012 Share #21 Â Posted December 27, 2012 Advertisement (gone after registration) My 90 APO-ASPH focuses PERFECT on my M9. I use 1.4x I'm confused now. Did you mean with your R9? If you're somehow using a 1.4x APO (with a 14127 R to M convertor) and 90AA with an M9 then it won't be rangefinder coupled so you'd have to be zone focussing and your comment that it "focuses PERFECT" doesn't make any sense. Â Pete. Link to post Share on other sites More sharing options...
Advertisement Posted December 27, 2012 Posted December 27, 2012 Hi farnz, Take a look here 90mm Summicron question. I'm sure you'll find what you were looking for!
UliWer Posted December 27, 2012 Share #22 Â Posted December 27, 2012 I think eukrania means the 1.4x magnifier for the viewfinder eyepiece - recommended for longer lenses. There is no problem to see the whole frame of 90mm with this magnifier - you can use it comfortably with 50mm. Â In my experience the 2/90mm AA is much easier to focus than the 2/75AA - because of it's longer focus throw. It's astonishing how much the focus throw matters. When I had a weak moment and acquired a Summarex I thought: "You are a fool, as you'll never be able to use it at f/1.5 !" When i tried it was no problem - as the focus throw of this lens is extremely long so you can be precise much easier than with lenses like the 75mm Summicron. Link to post Share on other sites More sharing options...
farnz Posted December 28, 2012 Share #23 Â Posted December 28, 2012 I think eukrania means the 1.4x magnifier for the viewfinder eyepiece .... <slaps forehead> Yes, of course he must. Thanks, Uli. Â I used to use the Leica 1.25x magnifier with my 90 APO asph but I eventually found that the higher contrast in the viewfinder without it made focussing easier so I stopped using it. Â Pete. Link to post Share on other sites More sharing options...
marcpruiz Posted April 20, 2013 Share #24 Â Posted April 20, 2013 Can anyone tell me where i can found the mtf curves of the summicron pre-asph 90mm? Thanks for advance! Marc Link to post Share on other sites More sharing options...
lct Posted April 21, 2013 Share #25 Â Posted April 21, 2013 Can anyone tell me where i can found the mtf curves of the summicron pre-asph 90mm?... Couple of them here (page 70): http://tinyurl.com/d4uehwy Link to post Share on other sites More sharing options...
marcpruiz Posted April 21, 2013 Share #26  Posted April 21, 2013 Couple of them here (page 70): http://tinyurl.com/d4uehwy  Thanks a lot Ict!! Link to post Share on other sites More sharing options...
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