visualopsins
Joined: 05 Mar 2009
Posts: 11019
Location: California
Expire: 2025-04-11
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 Posted: Mon Sep 04, 2017 6:11 am Post subject: |
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visualopsins wrote:
Let's ask again.
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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-A 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 (151B), 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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paulhofseth
Joined: 05 Mar 2011
Posts: 576
Location: Norway
Expire: 2018-06-28
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| Posted: Fri Oct 20, 2017 6:02 am Post subject: c\y-M42-PK |
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paulhofseth wrote:
Since no one with primary knowledge of this particular issue has replied, I take on the risk of offering second-hand information.
The excellent list :
http://stephen-westin.com/misc/mounts-alphabetical.html
where mr. Westin revives the Markerink list, shows the slender dimensional difference, 0,04mm , that is available for a separate, add-on, mount adapter in this case, so, as your other PK conversions indicate, you are well aware of the need to replace the entire mount.
I do not have any PK-mount cameras, but do believe that Asahi-Pentax once produced a standard M42-PK adapter allowing the Takumars to be attached to the Kmounts. Hence,if there is an M42 -replacement mount available for the C\Y lens you wish to convert, that, plus the M42-PK adapter should suffice. If, however, there are knobs and protuberances on the PKmount camera that you wish to use, the lens diameter beyond the mount itself may interfere.
I have tried a PKmount lens on a C\Y mount: the mounts are so similar that the lens will almost seem to fit, but not lock on properly and of course not focus all the way to infinity. If the mount dimensions -including aperture linkages etc allow this, you can try the C\Y mount lens on your camera first in order to se if there are any snags.
p. |
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