|Posted: Wed Dec 31, 2014 3:53 pm Post subject:
A fast way to test if a lens will hit the mirror of EOS FF is to observe the back part of the lens with the adapter installed: if any part of the lens protrudes from adapter it will probably hit the mirror when focusing the infinity. You can test also with a rule, moving it over the back side of the adapter, to check if it touches the lens back. Some lenses deserves a shaving intervention and it's ok - Mir 1B, some versions of Helios 42, and so on. Other lens have the back element to far into the camera body - Takumar 3.5/35 f.i. - and can not be used at infinity.
You'll not brake the mirror camera just testing it, I did several times, gently touching the mirror, and the Mk II I own is ok.
Thanks for that.
I tested all my lenses on the 5D today and only the Nikon 50/1.2 was a problem. The small metal tab was easily removed and now it works perfectly. The Planar 50/1.7 does have a little bit protruding from the back but it didn't interfere with the mirror.
All in all, I'm delighted.
(the Samyang 8/3.5 is for crop sensors, I'll use my Zenitar 16mm fisheye instead)
I bought an old EOS film camera to test for mirror hit. (Canon Rebel K2) Works fine!
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Cameras: Sony A7Rii, Spotmatics II, F, and ESII
M42 Asahi Optical Co., Lenses: S-M-C Takumars 1:4.5/20 & 1:2/35, SMC Takumar 1:1.4/50, S-M-C Takumars 1:1.8/85, 1:3.5/135, 1:2.5/135 (II), 1:4/200, 1:4.5/500, & S-M-C Macro-Takumar 1:4/100
M42 Asahi Optical Co., Lenses: Auto-Takumar 1:2.3 f=35, Super-Takumar 1:2/35 (Fat), Super-Takumar 1:1.4/50 (8-element), Auto-Takumar 1:2 f=55mm, Tele-Takumar 1:5.6/200, Tele-Takumar 1:6.3/300
Nikon Nikkor AI-S 35-135mm f/3,5-4,5, Tamron SP 51B 17mm f/3.5, Tamron SP 55BB 500mm f/8, Tamron SP 19AH 70-210mm f/3.5