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 Replies: 10 / Views: 4,065 |
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Pillar of the Community
2087 Posts |
Back in march: https://goccf.com/t/255965As a result of the work that thread covered I contacted RAF Camera in Belarus. He agreed to produce a MFT mount for one of my minolta bellows( I believe he has also produced Nikon and EOS mounts) The MFT mount arrived today it took all of 6 minutes to fit. It is a very sturdy fit with no unnecessary movement( the modification is also reversable). For anyone wanting to work out how to do the conversion have a look at the link, I believe that, although it covers a slightly different modification, it will provide you with all the info needed to carry out the mount swap. Before the swap I was using an MD to MFT adapter.. this immediately meant that at zero bellows extension the sensor was 85mm from the rear of the lens.  Here is a base line photo ( using the MD-MFT adapter) at zero extension I am getting way too much magnification:  After the conversion this is the result( followed by a second shot at zero bellows extension)    The mount conversion reduced the distance between the sensor and the rear of the lens by almost 20mm. There is no point doing this conversion for sony E-mount (particularly the Sony A7rm2 as the camera body will collide with other parts of the bellows), but it is certainly worthwhile for MFT and I suspect it will be useful for Nikon and canon mounts Edited by austrokiwi
04/21/2016 11:39 am
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Pillar of the Community
 United States
4038 Posts |
Awesome! I will contact Raf about the EOS mount version...
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Pillar of the Community
United States
949 Posts |
Does this modified mount have a chipset in it to permit you to use the Aperture priority mode when the bellows is fitted up? For my present workaround that could replace two rings between the bellows and the camera with the one modified adapter.
I had been using a Kenko auto extension tube ring to get the clearance for the rotation of the cam on the bellows, but for use with enlarger lenses I have to rethink that.
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Pillar of the Community
 2087 Posts |
Unfortunately no. I believe you can buy the chip sets separately and fit them to the mount. If you went in that direction it would be best to liaise with RAF camera first as he might have to produce a slightly different version to allow the proper seating of the chip set.
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Pillar of the Community
United States
949 Posts |
I just spent a frustrating day spinning my wheels.
After reading about your efforts to alter your bellows mount for 360 degree rotation, I remembered my old Olympus OM bellows could do that. It is also about 1 cm shorter from the mount to the focal plane when attached; giving me that much less minimum extension. So I thought I would hunt down an adapter for an OM (Zuiko) lens to a Nikon F camera body, or an OM lens to a M42 (Pentax) body. HA!! 6 hours later, no dice.
Well, there is a Zuiko to Nikon F adapter for some lens models, (requiring the removal of the original Zuiko flanges) but apparently this will not work with the bellows nor with extension tubes. So much for adding a cheap modified tube ring.
So does anyone know how to attach an Olympus OM (Zuiko) bellows to a Nikon F mount camera (specifically a D80)?
Edited by lrbguy
04/21/2016 7:05 pm
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Pillar of the Community
United States
9395 Posts |
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So I thought I would hunt down an adapter for an OM (Zuiko) lens to a Nikon F camera body, or an OM lens to a M42 (Pentax) body. HA!! 6 hours later, no dice Too bad you don't have a Canon DSLR. It's real easy to find EOS to OM adapters. Those are one of the 5 "easy" adapters to find (EOS->Nikon F, EOS->Leica R, EOS->Contax/Yashica bayonet, EOS->OM, EOS->M42). The problem with the Olympus bellows is that you need a 14mm OM extension tube (or 14 mm Canon tube?) behind the bellows to fit many Canon DSLRs to it. The 14mm extension tube, along with any front lens-to-bellows adapters, increases the minimum bellows extension quite a bit. The tough part with the Olympus bellows is adapting certain lenses to the front of the bellows, although M-42 is possible. Of course, Olympus OM lenses are really convenient (but watch out for accidently hitting that lever on the Olympus bellows that keeps the OM lens wide open). For using non-Olympus lenses, I've switched over to a Pentax M42 bellows, with minimal extension added by the adapters. |
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Pillar of the Community
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4038 Posts |
I contacted Raf and I have an EOS adapter on the way. Will report on usability when I get it.
Contact me for photographic equipment or visit my home page at: http://macrocoins.com |
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Pillar of the Community
2087 Posts |
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The tough part with the Olympus bellows is adapting certain lenses to the front of the bellows, although M-42 is possible. Of course, Olympus OM lenses are really convenient (but watch out for accidentally hitting that lever on the Olympus bellows that keeps the OM lens wide open). I have made two different adapters for OM to my bellows. The second and best is a Olympus OM 14mm extension ring. I just replaced the OM camera mount on that extension ring with a M42 mount adapter( In my case M42-Minolta MD) Raf Camera advised me he doesn't chip adapters. I have a complete Minolta bellows IV( non tilt shift) that I assembled out of parts. I tried to sell it a while back and didn't get any takers so I will probably convert it to MFT and then try to sell it again. Edited by austrokiwi
04/21/2016 11:17 pm
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Pillar of the Community
United States
949 Posts |
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Olympus OM 14mm extension ring. I just replaced the OM camera mount on that extension ring with a M42 mount adapter( In my case M42-Minolta MD)
Thanks for the reply AK. I think I understand the plan, but not its execution. How do you attach the adaptor to the altered OM tube? It sounds like you take the rear flange (male) off the ring and somehow replace it with M42 (male) threads. Or are you taking the M42 (female) threads off the M42-Monolta MD adapter and somehow attaching the remainder to the altered OM extension tube? If I could find a removable source for the "male" M42 threads, I think I'd be in business. How do you attach M42 threads to the ring? Do you take them from some other "X to M42" adapter? |
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Pillar of the Community
2087 Posts |
I just removed the OM mount plate( camera side) and replaced it with the M42-md adapter. I just had to drill four holes in the M42-Md adapter and then just screwed it on to the extension ring( after removing the OM mount and filling the gap left from removing the mechanism for adjusting the aperture. took all of 15 minutes to do.
Edited by austrokiwi
04/22/2016 08:31 am
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Pillar of the Community
United States
949 Posts |
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and then just screwed it on to the extension ring Are you saying that underneath the OM flange you took off the ring it is threaded for M42? |
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Posted 04/21/2016 12:53 pm
