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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Sat Jul 27, 2019 11:44 pm Post subject: RE Auto-Topcor Mount |
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cbass wrote:
Hello. My name is Sebastian. I am an adapted lens addict. I have lurked here for along time and tried to fight my addiction but I have lost. So now I have joined this forum and accepted my condition. Luckily old lenses are cheap and don't take up much space.
Anyways, I recently purchased a RE. Auto-Topcor 13,5cm lens. I did some quick searching, but it's not clear to me what mount is used. K&F website says topcor mount. Can someone guide me what adapter I would need to mount this lens to a Fuji X-mount camera (X-T1). |
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alex ph
Joined: 16 Mar 2013 Posts: 1571
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Posted: Sun Jul 28, 2019 12:17 am Post subject: |
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alex ph wrote:
Welcome Sebastian!
Re.Topcor lenses have the same mount as Exakta. So you may get one cheap to start with.
Please share your shots and experiments, make visible your observations and questions. This way you will contribute to the precious and diversified knowledge base this forum is. And you will see how gentle are expert members here. |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2927 Location: Eugene
Expire: 2015-08-20
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Posted: Sun Jul 28, 2019 12:44 am Post subject: |
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jamaeolus wrote:
Cheap simple adapter will set you back under 15 dollars delivered. For your camera you can likely get a helical adapter. They are a bit more but allow you to focus close. _________________ photos are moments frozen in time |
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Sciolist
Joined: 29 Mar 2017 Posts: 1445 Location: Scotland
Expire: 2021-04-16
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Posted: Sun Jul 28, 2019 10:22 am Post subject: |
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Sciolist wrote:
Welcome Sebastian. |
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y
Joined: 11 Aug 2013 Posts: 304 Location: EU
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Posted: Sun Jul 28, 2019 1:12 pm Post subject: Re: RE Auto-Topcor Mount |
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y wrote:
cbass wrote: |
Hello. My name is Sebastian. I am an adapted lens addict. I have lurked here for along time and tried to fight my addiction but I have lost. So now I have joined this forum and accepted my condition. Luckily old lenses are cheap and don't take up much space.
Anyways, I recently purchased a RE. Auto-Topcor 13,5cm lens. I did some quick searching, but it's not clear to me what mount is used. K&F website says topcor mount. Can someone guide me what adapter I would need to mount this lens to a Fuji X-mount camera (X-T1). |
Hello, as others mentioned, Topcor RE cameras feature a modified (to allow open-aperture TTL metering) Exakta bayonet mount. Note that adapter manufacturers often label these Exakta/Topcor RE adapters simply as "EXA". So search for a "EXA to Fuji X" adapter. |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Sun Jul 28, 2019 8:20 pm Post subject: |
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cbass wrote:
Thank you. That is what i need to know. |
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pdccameras
Joined: 23 Aug 2009 Posts: 826 Location: Putnam, CT
Expire: 2014-08-11
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Posted: Sun Jul 28, 2019 8:45 pm Post subject: |
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pdccameras wrote:
Welcome to the forum, Sebastien,
Here is what one of the simple adapters looks like:
_________________ Canon 5D Mii, Canon 40D, Canon 350D IR, Sony A7 Mii, Sony Alpha-6000, a ton of lenses: AF & MF and too many cameras to count, all formats: 110 - 4x5. |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Tue Jul 30, 2019 7:31 pm Post subject: |
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cbass wrote:
I have one more question. Looks like these lenses are from the 1960s and 1970s. They appear to come with rubber. I am going to assume this rubber will degrade as time goes on if not already. Is there replacement rubber you can buy? Is there some way to restore/preserve the rubber? |
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alex ph
Joined: 16 Mar 2013 Posts: 1571
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Posted: Tue Jul 30, 2019 7:48 pm Post subject: |
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alex ph wrote:
If you look at the secondary market, you'll find many more lenses with perfectly conserved rubber than with degraded or missing one. This is due to vulcanization invented back in the late XIX century: the rubber is "tempered" and does not easily degrade under moderate use. While recommended shelf life of rubber products vary from 5 to 20 years, the really visible degradation normally starts being visible long after. As long as we touch our lenses gently and normally do not bring them to Sahara or Siberia, I think we have at least another 30 years until the issue manifests itself in a massive way. |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Tue Jul 30, 2019 10:24 pm Post subject: |
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Lightshow wrote:
I'm not 100% sure about this, but I think the early Topcor lenses with rubber seem to be worse off than the later ones, it could be a function of a number of things during the vulcanization process like temperature & duration. _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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Blazer0ne
Joined: 12 Sep 2018 Posts: 836
Expire: 2024-12-07
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Posted: Wed Jul 31, 2019 3:00 am Post subject: |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 6:21 pm; edited 1 time in total |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Wed Jul 31, 2019 3:50 am Post subject: |
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cbass wrote:
I live in Arizona. If it isn't stone or dirt it's going to disintegrate soon enough.
Even then, let's say the lens was made in 1965 that makes it a 54 year old lens.
Even the lenses that look mint, unused with perfect glass and minimal dust if you look
closely you can see tiny cracks starting to develop in the rubber even if it looks good overall. |
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stevemark
Joined: 29 Apr 2011 Posts: 3754 Location: Switzerland
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Posted: Wed Jul 31, 2019 9:30 am Post subject: |
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stevemark wrote:
cbass wrote: |
I live in Arizona. If it isn't stone or dirt it's going to disintegrate soon enough.
Even then, let's say the lens was made in 1965 that makes it a 54 year old lens.
Even the lenses that look mint, unused with perfect glass and minimal dust if you look
closely you can see tiny cracks starting to develop in the rubber even if it looks good overall. |
I have the same problem, especially with elder Mamiya lenses (XTL series) and some Canon FL lenses.
To repair such a lens you can carefully glue the parts back on the metal using e. g. "Pattex Repair Gel Extreme" (or a similar product). It's also possible to correct an overstretched rubber grip using the same kind of glue. To keep the rubber grip parts in the correct position I do apply a stretchy duct tape just after gluing.
Stephan _________________ www.artaphot.ch |
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Blazer0ne
Joined: 12 Sep 2018 Posts: 836
Expire: 2024-12-07
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Posted: Wed Jul 31, 2019 12:48 pm Post subject: |
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Blazer0ne wrote:
...
Last edited by Blazer0ne on Tue Feb 22, 2022 4:46 pm; edited 1 time in total |
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alex ph
Joined: 16 Mar 2013 Posts: 1571
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Posted: Thu Aug 01, 2019 11:08 pm Post subject: |
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alex ph wrote:
Reading your comments, fellows, I ask myself if I was not too optimistic. Saying that, I acknowledge to have had rubber issues among the rarest ones as compared to stiff focus, fungus, oily aperture and some other mechanic troubles. |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2927 Location: Eugene
Expire: 2015-08-20
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Posted: Fri Aug 02, 2019 4:18 pm Post subject: |
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jamaeolus wrote:
I use Armor-All leather protectant. It returns some of the softening agents to the rubber. It is also useful on plastic parts to prevent drying and cracking. As indicated light and heat are the main enemies. So like the Traveling Wilbury's song store it a cool dark place. Original type replacement will be near impossible. A nice looking substitute is a pebble grain leather or good quality vinyl. Measure very carefully and install with contact cement, _________________ photos are moments frozen in time |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Fri Aug 02, 2019 5:21 pm Post subject: |
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cbass wrote:
I found a replacement. It just costs more than I paid for the lens.
https://www.adorama.com/cg1401.html?utm_medium=cpc&utm_source=adl-gbase
Also. I have read that some RE Auto Topcors will not fit Exackta adapters?
You may have to trim a pin. What pin? Is this only on some Topcors? |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Sat Aug 03, 2019 7:26 pm Post subject: |
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Lightshow wrote:
This grip is too aggressive, like gear teeth, the real ones are much smoother.
Quote: |
Also. I have read that some RE Auto Topcors will not fit Exackta adapters?
You may have to trim a pin. What pin? Is this only on some Topcors? |
RE lenses have extra pins for communicating to the camera it's aperture position on the outside, and to auto stop-down the aperture when you take the exposure.
Both of my adapters fit just fine on both my Exakta and Topcor lenses(R & RE), I should note that RE lenses don't mount on R bodies for this reason, F-Auto lenses too.
Blazer0ne wrote: |
Exakta is funny, because it has a release lever which, I think, is the weak link to the system. It can be accidently disengaged when you reach to focus or just wear out. |
I have 2 adapters, one with a long lever that is quite easy to unlock:
And one(adapter brand is Big_is, prior to his abandoning adapters, but this looks like it) with a shorter lever that doesn't stick out as much, it takes 3x the effort to unlock the mount(the lever doesn't protrude from the body) and looks great on the RE's:
Quote: |
The Fotasy never locked onto my Topcor lenses in a reliable fashion, but did safely work with other brands of Exakta mount lenses. It has something to do with the shape of the tooth that receives the locking pin on the lens. The lever on the fotasy broke after a not much use, right where the lever meets the locking pin. It was also a very tight fit. Maybe if I ordered two the other would have been fine.
I will only use Fotodiox Pro for my very best Topcor lenses, because I can trust them so far. |
I don't mind it, it's far more robust than Konica F(what were they thinking?).
Anyways, it looks like your lever was made from aluminum and not chrome plated brass/steel like mine appears to be.
_________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Tue Aug 20, 2019 5:54 pm Post subject: |
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cbass wrote:
So I have my Topcor to Fuji adapter. However, I want to try this lens on my speed booster which has a Canon EF mount. Does anyone have a suggestion for a EXA to EF adapter? I see two kinds. One is a slim piece of metal. The other is a larger adapter that appears to have a glass element in it. The slim adapter also has two variations. One with a single long slot. Another with two long slots. |
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Lightshow
Joined: 04 Nov 2011 Posts: 3669 Location: Calgary
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Posted: Thu Aug 22, 2019 2:20 am Post subject: |
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Lightshow wrote:
I didn't see any on eBay other than the standard Exakta to EF adapters, they don't have an outer groove like in this thread.
http://forum.mflenses.com/exakta-to-eos-adapter-from-alex-t19643.html _________________ A Manual Focus Junky...
One photographers junk lens is an artists favorite tool.
My lens list
http://www.flickr.com/photos/lightshow-photography/ |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Thu Aug 22, 2019 2:56 am Post subject: |
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cbass wrote:
From the slim adapters I see this one:
and this one:
None look like in the thread you posted. |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2927 Location: Eugene
Expire: 2015-08-20
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Posted: Thu Aug 22, 2019 2:43 pm Post subject: |
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jamaeolus wrote:
Exa and exakta use the same mount. Exa was Ihagee's lower tier camera. They use all the same lenses. There must be a half dozen Exakta to EOS (EF) adapters to choose from via dozens of ebay venodors. _________________ photos are moments frozen in time |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Thu Aug 22, 2019 5:19 pm Post subject: |
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cbass wrote:
It's not so simple as just grabbing any Exakta adapter. Auto Topcor lensese are a modified Exakta mount. I looked at the lens and the previous post pointed to the adapter I think I need. It needs to have a outer channel. If it doesn't, then I will need to file parts off the lens. |
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jamaeolus
Joined: 19 Mar 2014 Posts: 2927 Location: Eugene
Expire: 2015-08-20
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Posted: Thu Aug 22, 2019 5:44 pm Post subject: |
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jamaeolus wrote:
This is true. Topcon mounted to the same bayonet style. That is, diameter and bayonet lugs are the same. But pins and connections and so forth are different. The pins in the base of the Topcon are generally tiny screw in posts which usually can be removed with a very tiny screwdriver (be sure to save and mark where the came from if you ever intend to sell the lens!) _________________ photos are moments frozen in time |
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cbass
Joined: 27 Jul 2019 Posts: 441
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Posted: Thu Aug 22, 2019 7:18 pm Post subject: |
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cbass wrote:
Those screws are the least of my worries. The outer slot is important because as you move the aperture ring there is a pin that moves. I think I finally found the adapter that I need. It says it's not for Full Frame canon camera's but APS-C, which is fine with me as the plan is to mount it to a lens turbo ii speed booster. Hopefully the speed booster glass elements are deep enough that the mount doesn't hit the glass. Here is the adapter I found. I think this is the one.
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