visualopsins
Joined: 05 Mar 2009
Posts: 10541
Location: California
Expire: 2025-04-11
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 Posted: Wed Jun 19, 2019 12:28 am Post subject: |
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visualopsins wrote:
Not exactly. Canon FF mirror hits those same lenses near infinity focus. Lucky for me the lenses aren't usually focused to infinity. The Takumar focuses beyond infinity with the M42 EOS adapter; mirror will not hit if infinity is in focus, not beyond; in warm weather but not cold, go figure. 
An M42 to E focal reducer might not have the problem; maybe somebody here knows...
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Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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aidaho
Joined: 29 Apr 2018
Posts: 456
Location: Ukraine
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| Posted: Thu Jun 20, 2019 10:16 pm Post subject: Re: 50mm ... not hitting focal reducer ... |
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aidaho wrote:
| gLOW-x wrote: |
| I use a VILTROX EF-E II (EOS to Sony E) focal reducer, with an additional M42 to EOS adapter. |
So I actually tried this same setup word for word with Helios 44M-6.
While yes, Viltrox vII seem to have less room than Lens Turbo II, there was no REC.
I should probably do a separate recheck for both pieces of glass for 100% correct adjustment, but just from looking at Helios (lack of) back protrusion at infinity, it looks safe to me.
If every lens without internal focusing causes REC, booster might not be correctly adjusted after all.
Have you by chance used IF lenses to reach a conclusion about booster being set correctly?
A lot of AF lenses are IF and IF is sensitive/finicky: IF lenses won't focus the same way on film and on digital, even if the adapter of the correct thickness is used.
It's not hard to imagine how the correct adjustment for IF lens screws up focusing for every other piece of glass out there.
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https://www.flickr.com/photos/curry-hexagon/ |
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