pfha1679 Posted January 13, 2015 Share #1 Posted January 13, 2015 Advertisement (gone after registration) need to calibrate the focus when using ltm mount lens on M8/M9?(like canon ltm 50mm ) Link to post Share on other sites More sharing options...
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Dougg Posted January 13, 2015 Share #2 Posted January 13, 2015 need to calibrate the focus when using ltm mount lens on M8/M9?(like canon ltm 50mm ) I think there is no reason screw-mount lenses have more need of calibration than bayonet-mount lenses. But I like to have all lenses calibrated if only for peace of mind. It is also important to get a high-quality screw-to-bayonet adapter, Leica or Voigtlander for instance, because in using an adapter you're adding two more surfaces for manufacturing tolerances to be off a bit. Doug Link to post Share on other sites More sharing options...
jaapv Posted January 13, 2015 Share #3 Posted January 13, 2015 And you certainly do not need to calibrate the camera, it must be the lens. To have the whole system working correctly, both lenses and camera bodies must be calibrated to a common standard. Link to post Share on other sites More sharing options...
Lenshacker Posted January 14, 2015 Share #4 Posted January 14, 2015 Two variables that often mean you need to calibrate a screw-mount lens for a Digital Leica: 1) Different Manufacturers make assumptions of how film sat in their cameras, 2) Manufacturers optimize their lenses for best performance at a specific aperture setting. I've found that Nikon lenses were optimized for best results at full-aperture, Canon optimized their lenses ~1Stop down. Same with the Leica Summarit, 5 that I've used were best at F2.8 at close-focus. With film cameras, this often went unnoticed. With pixel-peeping, "what a difference an inch makes". My Canon 50/1.5 is now optimized for wide-open use, required changing the shim. If the lens is back-focusing at all apertures, it needs to be adjusted. If it slightly front-focuses when used wide-open, most likely it's optimized for 1~2 stops down. This can usually be changed by adjusting the shim. Some lenses are easier than others. Link to post Share on other sites More sharing options...
Guest Posted January 18, 2015 Share #5 Posted January 18, 2015 my canon 50/1.4 works nice on my m8, fokus is spot on....no reason to callibrate. lambda. Link to post Share on other sites More sharing options...
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