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Ash
Joined: 12 Mar 2010
Posts: 185
Location: Evanston, il, usa
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 Posted: Wed May 26, 2010 8:58 pm Post subject: Minolta 50mm 1.4 rokkor mc conversion |
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Ash wrote:
Hi,
I just got Minolta MC 50/1.4 rokkor in excellent condition. I want to convert its mount to minolta A mount. Any suggestions? It appears to be a lot diff than minolta MC 58/1.2. |
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Ash
Joined: 12 Mar 2010
Posts: 185
Location: Evanston, il, usa
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| Posted: Thu May 27, 2010 3:01 pm Post subject: |
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Ash wrote:
Some picture of the mount. Screws are on the side not on the top and thus not sure how to proceed with it.
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wilson.c
Joined: 18 Jan 2010
Posts: 364
Location: Hong Kong
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| Posted: Thu May 27, 2010 4:47 pm Post subject: |
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wilson.c wrote:
I've got one of these in my 'projects' drawer to be converted to Canon EF mount. It's not impossible but this type of mount is more difficult to convert than some of the other Rokkors.
I'm sourcing a small lathe 7x14 from China to play around with this and other stuff. Current status, I've tried to sand down the rear plate (you can remove the Minolta mount) to the right specs, but it takes too darn long!
Good luck, and let us know how it goes.
_________________
Wilson
DSLR: Canon 5DMkII, 500D + Panasonic GF-1
SLR: Canon T90, Canon F1, Canon A1, Canon AE1 + Rolleiflex SL66 + Bronica ETRs
R'finder: Contax G1, G2 + Leica M6, M3 + Contax II
Lenses
M42: Angenieaux 90/1.8
Canon: FD 50/3.5 Macro, FD 80/1.8, FD 80-200L/4
Contax G: CZ Hologon 16/8, CZ Biogon 21/2.8, CZ Biogon 28/2.8, CZ Planar 45/2.0, CZ Sonnar 90/2.8
P-Six: CZJ Sonnar 180/2.8, CZJ Biometar 120/2.8
Contax: Distagon 28/2.8, Distagon 28/2, Planar 85/1.4, Makro-Planar 100/2.8
Others: CZ Sonnar 135/3.5 (Hasselblad V mount)
More little ones to be documented.
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Ash
Joined: 12 Mar 2010
Posts: 185
Location: Evanston, il, usa
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| Posted: Thu May 27, 2010 5:01 pm Post subject: |
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Ash wrote:
I have a spare M42 to Minolta A mount adapter which I originally thought that I would use to mount it. But when I saw that it has screws on the side, I dont know what to do |
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hasan
Joined: 12 Mar 2007
Posts: 313
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| Posted: Thu May 27, 2010 5:45 pm Post subject: |
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hasan wrote:
| Ash wrote: |
| I have a spare M42 to Minolta A mount adapter which I originally thought that I would use to mount it. But when I saw that it has screws on the side, I dont know what to do |
Maybe this helps.
http://pentaxkmount.blogspot.com/2009/06/minolta-mdmc-mount-to-pentax-k-mount.html
I am also looking for for a "MD lens to PK" conversion. |
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Ash
Joined: 12 Mar 2010
Posts: 185
Location: Evanston, il, usa
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| Posted: Thu May 27, 2010 6:34 pm Post subject: |
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Ash wrote:
I have seen similar conversion but in this lens mounting screws are on the side. I will open it and see how it work out. |
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EdSawyer
Joined: 06 Oct 2008
Posts: 43
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| Posted: Wed Jun 02, 2010 3:54 am Post subject: details |
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EdSawyer wrote:
I posted details somewhere on FM about converting this type of minolta lens to EOS. Search on Rokkor 35/1.8 conversions.
The rear silver ring with screws on the side is just a trim ring. In effect (at least on EOS conversions) it becomes the new mounting surface.
Whether this is doable or not on the A mount depends on the registration difference. on EOS it's only .5mm so it's pretty doable (but trickier than 58/1.2).
nutshell:
remove silver trim ring
remove rear mount with apeture linkage
remove extra parts in aperture linkage and re-rig with spring
remove orig. mount bayonet (screwed in from behind), machine down and mount it inside new mount bayonet (EOS in my case).
re-use orig. bayonet screws to hold new and old bayonet (epoxied together) back onto orig mount base, which has been reduced .5mm (or more).
reduce trim ring to match mount base and re-attach with radial screws.
-Ed |
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