t024484 Posted July 24, 2007 Share #1 Posted July 24, 2007 Advertisement (gone after registration) I have three brand new 6 bit coded Summicrons for my M8, resp 28, 50 and 75 mm. My 28 and 50 mm lenses do focus spot on at .7 meter, at infinity and everything in between. My 75mm however, focusses spot on at 0.7 meter and at infinity, but in the range from 2 meter to 4 meter where I would like to use it most for portraits, it is has a backfocus of 10 to 15 cm, which makes this lens almost unuseable. Any ideas what the cause can be, and even better how to solve this ? Link to post Share on other sites More sharing options...
Advertisement Posted July 24, 2007 Posted July 24, 2007 Hi t024484, Take a look here Strange Focus Problem.. I'm sure you'll find what you were looking for!
jaapv Posted July 24, 2007 Share #2 Posted July 24, 2007 I would say: solve it by sending it to Leica to calibrate, or better still, have your dealer exchange it under guarantee. As to the cause, wel, there are reams of back-focus, mis-focus and focus shift threads hidden in this forum. No need to go over it again. The cause is irrelevant, the solution counts. Link to post Share on other sites More sharing options...
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