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kryss
Joined: 13 Sep 2009
Posts: 2169
Location: Canada
Expire: 2017-09-18
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 Posted: Thu Apr 25, 2013 5:40 pm Post subject: Mamiya Sekor 85mm f2.8 SX. PK Mount. |
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kryss wrote:
My lens arrived today and appears to have had a mod to PK mount(inside box in glassine pouch was ball bearing screw and old actuator blade) The lens fits on all my SLR Pentax bodies including MZ5n & PZ1p but will not mount on my K20D is there something I am missing? Cheers. |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Fri Apr 26, 2013 8:39 am Post subject: |
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aoleg wrote:
Can you post a picture of the lens mount? It must be a custom mod, so whoever did it might got it wrong somewhere. It could also be that they did not file (or otherwise shorten) the protruding "skirt" around the lens mount; this "skirt" is what generally prevents Mamiya SX lenses to be mounted on many types of M42 adapters (e.g. M42-EOS).
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kryss
Joined: 13 Sep 2009
Posts: 2169
Location: Canada
Expire: 2017-09-18
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| Posted: Fri Apr 26, 2013 1:23 pm Post subject: |
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kryss wrote:
I will post pic.of lens mount but you mention M42 adapter,this has nothing to do with M42 adapters it is a mod tp Pentax PK and it is obvious that there is a difference of some sort on the Pentax K20 D body, compared to manual film SLR's, and the Pentax auto cameras like PZ1p and MX5n,Theoretically if it mounts on PZ1p & MX5n it should mount on k20D.NO M42 mount needed. |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Fri Apr 26, 2013 5:42 pm Post subject: |
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aoleg wrote:
| kryss wrote: |
| I will post pic.of lens mount but you mention M42 adapter,this has nothing to do with M42 adapters it is a mod tp Pentax PK and it is obvious that there is a difference of some sort on the Pentax K20 D body, compared to manual film SLR's, and the Pentax auto cameras like PZ1p and MX5n,Theoretically if it mounts on PZ1p & MX5n it should mount on k20D.NO M42 mount needed. |
In this case, it could be either the mount (who knows where they sourced it?) or the "skirt", which is simply an extension of aperture control ring protruding towards the mount.
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kryss
Joined: 13 Sep 2009
Posts: 2169
Location: Canada
Expire: 2017-09-18
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| Posted: Fri Apr 26, 2013 6:44 pm Post subject: |
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kryss wrote:
OK, but that doesn't explain why it fits AF camera like P1Zp and MZ5n and not my K20D,unless the 20D is different mount than the other two which I doubt. But many thanks for your comments. |
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aoleg
Joined: 22 Feb 2008
Posts: 1387
Location: Berlin, DE
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| Posted: Fri Apr 26, 2013 7:17 pm Post subject: |
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aoleg wrote:
Could be anything, really. If you post a picture of the mount, someone from the community will most probably be able to spot the problem.
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kryss
Joined: 13 Sep 2009
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Location: Canada
Expire: 2017-09-18
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| Posted: Fri Apr 26, 2013 10:04 pm Post subject: |
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kryss wrote:
Will do,thanks. |
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