can anyone help me out with lens id

**aslyfox** · 01-15-2017, 04:28 PM

some how I ended up with an old slr lens that isn't a Pentax mount

I am trying to find out anything I can about it.

"Tokura mc auto zoom 1:28 - 4 28-80 mm macro filter 62"

it is a bayonet mount with aperture ring but no "A" setting

can anyone help

Last edited by aslyfox; 01-15-2017 at 04:48 PM.

MarkJerling · 01-15-2017, 04:31 PM

I'd recommend that you post a photo of the mount. Someone will identify it in no time flat.

**c.a.m** · 01-15-2017, 04:36 PM

A Google search reveals a 'Tokura' brand, and several listings on eBay, including a 28-80.

You might have a typo in your OP (Toruka).

E-man · 01-15-2017, 04:49 PM

I'm not familiar with the Tokura brand, but an MC mount would most likely be for a manual focus Minolta SLR. The MC mount dates back to the early '70s and was introduced on the SRT series SLR bodies, which were very similar to the venerable Pentax K1000. The MC mount was succeeded by the MD mount in the '80s, which was similar to Pentax's KA mount in that it had a locking aperture ring with an "A" setting to allow Minolta's XD, XG and X-series cameras to control the aperture in aperture priority ("A") mode and the top-of-the line X-700 to operate the aperture in program ("P") mode as well. All MC lenses will mount on X-series cameras and the cameras will control the aperture just like with an MD lens as long as the aperture is set to the highest number. When Minolta introduced the autofocus Maxxum cameras in the mid-'80s, it had an entirely different lens mount although MC and MD lenses could be mounted to a Maxxum with an adapter. Sorry for rambling on a bit but I don't get to talk Minolta much anymore.

Last edited by E-man; 01-15-2017 at 04:59 PM.

**aslyfox** · 01-15-2017, 05:07 PM

Originally posted by c.a.m

A Google search reveals a 'Tokura' brand, and several listings on eBay, including a 28-80.

You might have a typo in your OP (Toruka).

yes. i did have a typo and I did google the lens

saw the ebay listings and even had google translate but really didn't learn much.

thanks for the catch on the typo

here are some pictures, the last has a barnes and noble gift card in it for scale

Sluggo · 01-15-2017, 05:23 PM

Yashica/Contax.

gmans · 01-15-2017, 05:25 PM

Canon FD mount maybe, the double aperture linkage might be it. Some knowledgable may confirm later or try this link to wiki. Canon FD lens mount - Wikipedia

disregard this post.

Last edited by gmans; 01-15-2017 at 05:33 PM.

Audi 5 cyl · 01-15-2017, 05:27 PM

Originally posted by Aslyfox

yes. i did have a typo and I did google the lens

saw the ebay listings and even had google translate but really didn't learn much.

thanks for the catch on the typo

here are some pictures, the last has a barnes and noble gift card in it for scale

It is a Contax/Yashica bayonet. Can be used on Pentax with infinity when aperture levers are removed and mount swapped for a pk bayonet.

**aslyfox** · 01-15-2017, 05:31 PM

Originally posted by Audi 5 cyl

It is a Contax/Yashica bayonet. Can be used on Pentax with infinity when aperture levers are removed and mount swapped for a pk bayonet.

Boy that was quick, thanks to everyone

makes sense, my dad used a yashica slr at one time and I inherited his stuff.

I have no use for it, it is available for anyone who wants it who wants to pay shipping + insurance

pm me please

I obviously haven't tried it out so cannot speak for quality or how it works.

Mani · 01-17-2017, 06:29 AM

i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it.

Audi 5 cyl · 01-17-2017, 06:51 AM

Originally posted by Mani

i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it.

This is a great lens! It is an exakta mount and some modifications are necessary to mount it on Pentax cameras.

Take a look at this link.

and this one, from the great RioRico

The way I modify exakta lenses (including the one you have shown here) is by:
- removing the bayonet,
- replacing it with a pk one, and
- I file down everything standing in the way to infinity.

**jlstrawman** · 01-17-2017, 06:54 AM

Originally posted by Mani

i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it.

The ISCO Göttingen lens manufacturer - Legacy Lens

Maybe the Exacta mount.

**aslyfox** · 01-17-2017, 07:30 AM

Originally posted by Mani

i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it.

You or anyone else can hijack away,my question has been answered

Kinda nice to think that this thread might live on

(Or not)

Mani · 01-17-2017, 08:07 AM

Originally posted by Audi 5 cyl

This is a great lens! It is an exakta mount and some modifications are necessary to mount it on Pentax cameras.

Take a look at this link.

and this one, from the great RioRico

The way I modify exakta lenses (including the one you have shown here) is by:
- removing the bayonet,
- replacing it with a pk one, and
- I file down everything standing in the way to infinity.

yes it does appear to be the exakta mount. I don't think i have the necessary craftsmanship to build such an adapter, and sadly the one exakta to pk adapter that i found is rather pricey for something like this. It was actually a set of 3 lenses: one is a domiplan 50 2.8, and the third one is a 100mm F4 all exakta mounts. The adapter solution audi suggested seems to not be interchangable and i have 2 left hands

Pirate · 01-17-2017, 08:27 AM

Ahoy!

Unless it's a trick of the light, the image posted of the Tokura lens MC mount and rear lens element seems to show either fungus or haze, If this is the case, keep it away from all other lenses and use it as a paperweight or doorstop as it'll cost way more to have pro cleaned than the value/worth of the lens itself. Hopefully I'm wrong, but if not do keep it off your camera body and away from other optics.

As for using it on a DSLR, you'll need a MC to K-Mount lens adapter (preferably a chipped version) as the camera then knows a lens is attached and you'll have both image stabilisation and a focus confirmation 'beep'. Using a plain adapter, the camera won't know a lens is fitted and therefore won't allow the shutter button to be depressed, so a menu change needs to be made to turn off any lens fitted functionality. There are several manual focus mounts such as M42, M39, SR, MC, MD and I'm a fan of M42 screw-mount for which I have a chipped-lens adapter and requires no camera menu changes as the camera 'sees' the lens. Of the M42 lenses,my current favourites are the Helios, Prinzflex, Asahi Pentax and *Jupiter brands (* best Jupiter lens models are the alpha-numeric models and not numeric such as 11A instead of 11 as they're vastly superior and normally have curved aperture blades).

Is any of this of use to you or have you since discovered all you need about using MF lenses on DSLR bodies?

01-15-2017, 04:28 PM	#1
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,582	can anyone help me out with lens id some how I ended up with an old slr lens that isn't a Pentax mount I am trying to find out anything I can about it. "Tokura mc auto zoom 1:28 - 4 28-80 mm macro filter 62" it is a bayonet mount with aperture ring but no "A" setting can anyone help Last edited by aslyfox; 01-15-2017 at 04:48 PM.

01-17-2017, 06:51 AM	#11
Audi 5 cyl Veteran Member Join Date: Mar 2015 Location: France Photos: Gallery \| Albums Posts: 363	Originally posted by Mani i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it. This is a great lens! It is an exakta mount and some modifications are necessary to mount it on Pentax cameras. Take a look at this link. and this one, from the great RioRico The way I modify exakta lenses (including the one you have shown here) is by: - removing the bayonet, - replacing it with a pk one, and - I file down everything standing in the way to infinity. Last edited by Audi 5 cyl; 01-17-2017 at 06:57 AM.

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01-15-2017, 04:31 PM	#2
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,408	I'd recommend that you post a photo of the mount. Someone will identify it in no time flat.

01-15-2017, 04:36 PM	#3
c.a.m Site Supporter Join Date: Jan 2013 Location: Ottawa, Canada Photos: Gallery \| Albums Posts: 4,191	A Google search reveals a 'Tokura' brand, and several listings on eBay, including a 28-80. You might have a typo in your OP (Toruka).

01-15-2017, 04:49 PM	#4
E-man Veteran Member Join Date: Aug 2012 Posts: 678	I'm not familiar with the Tokura brand, but an MC mount would most likely be for a manual focus Minolta SLR. The MC mount dates back to the early '70s and was introduced on the SRT series SLR bodies, which were very similar to the venerable Pentax K1000. The MC mount was succeeded by the MD mount in the '80s, which was similar to Pentax's KA mount in that it had a locking aperture ring with an "A" setting to allow Minolta's XD, XG and X-series cameras to control the aperture in aperture priority ("A") mode and the top-of-the line X-700 to operate the aperture in program ("P") mode as well. All MC lenses will mount on X-series cameras and the cameras will control the aperture just like with an MD lens as long as the aperture is set to the highest number. When Minolta introduced the autofocus Maxxum cameras in the mid-'80s, it had an entirely different lens mount although MC and MD lenses could be mounted to a Maxxum with an adapter. Sorry for rambling on a bit but I don't get to talk Minolta much anymore. Last edited by E-man; 01-15-2017 at 04:59 PM.

01-15-2017, 05:23 PM	#6
Sluggo Veteran Member Join Date: Sep 2006 Location: Ames, Iowa Photos: Gallery \| Albums Posts: 774	Yashica/Contax.

01-15-2017, 05:25 PM	#7
gmans Veteran Member Join Date: Dec 2012 Location: Hunter Valley,NSW, Australia Photos: Gallery \| Albums Posts: 2,466	Canon FD mount maybe, the double aperture linkage might be it. Some knowledgable may confirm later or try this link to wiki. Canon FD lens mount - Wikipedia disregard this post. Last edited by gmans; 01-15-2017 at 05:33 PM.

01-15-2017, 05:27 PM	#8
Audi 5 cyl Veteran Member Join Date: Mar 2015 Location: France Photos: Gallery \| Albums Posts: 363	Originally posted by Aslyfox yes. i did have a typo and I did google the lens saw the ebay listings and even had google translate but really didn't learn much. thanks for the catch on the typo here are some pictures, the last has a barnes and noble gift card in it for scale It is a Contax/Yashica bayonet. Can be used on Pentax with infinity when aperture levers are removed and mount swapped for a pk bayonet.

01-15-2017, 05:31 PM	#9
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,582 Original Poster	Originally posted by Audi 5 cyl It is a Contax/Yashica bayonet. Can be used on Pentax with infinity when aperture levers are removed and mount swapped for a pk bayonet. Boy that was quick, thanks to everyone makes sense, my dad used a yashica slr at one time and I inherited his stuff. I have no use for it, it is available for anyone who wants it who wants to pay shipping + insurance pm me please I obviously haven't tried it out so cannot speak for quality or how it works.

01-17-2017, 06:29 AM	#10
Mani New Member Join Date: Jan 2017 Location: BA-WÜ Photos: Gallery Posts: 24	i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it.

01-17-2017, 06:54 AM	#12
jlstrawman Site Supporter Join Date: Feb 2010 Location: Midwest US Photos: Gallery Posts: 1,058	Originally posted by Mani i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it. The ISCO Göttingen lens manufacturer - Legacy Lens Maybe the Exacta mount.

01-17-2017, 07:30 AM	#13
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,582 Original Poster	Originally posted by Mani i'm sorry if i am hijacking your thread OP, but i have a similar issue with a lens i found that belonged to my grandfather. its nothing special i think, but i would really love to know which mount this is and if i can get an adapter for pk for it. You or anyone else can hijack away,my question has been answered Kinda nice to think that this thread might live on (Or not)

01-17-2017, 08:07 AM	#14
Mani New Member Join Date: Jan 2017 Location: BA-WÜ Photos: Gallery Posts: 24	Originally posted by Audi 5 cyl This is a great lens! It is an exakta mount and some modifications are necessary to mount it on Pentax cameras. Take a look at this link. and this one, from the great RioRico The way I modify exakta lenses (including the one you have shown here) is by: - removing the bayonet, - replacing it with a pk one, and - I file down everything standing in the way to infinity. yes it does appear to be the exakta mount. I don't think i have the necessary craftsmanship to build such an adapter, and sadly the one exakta to pk adapter that i found is rather pricey for something like this. It was actually a set of 3 lenses: one is a domiplan 50 2.8, and the third one is a 100mm F4 all exakta mounts. The adapter solution audi suggested seems to not be interchangable and i have 2 left hands

01-17-2017, 08:27 AM	#15
Pirate New Member Join Date: Oct 2012 Location: Liverpool Posts: 14	Ahoy! Unless it's a trick of the light, the image posted of the Tokura lens MC mount and rear lens element seems to show either fungus or haze, If this is the case, keep it away from all other lenses and use it as a paperweight or doorstop as it'll cost way more to have pro cleaned than the value/worth of the lens itself. Hopefully I'm wrong, but if not do keep it off your camera body and away from other optics. As for using it on a DSLR, you'll need a MC to K-Mount lens adapter (preferably a chipped version) as the camera then knows a lens is attached and you'll have both image stabilisation and a focus confirmation 'beep'. Using a plain adapter, the camera won't know a lens is fitted and therefore won't allow the shutter button to be depressed, so a menu change needs to be made to turn off any lens fitted functionality. There are several manual focus mounts such as M42, M39, SR, MC, MD and I'm a fan of M42 screw-mount for which I have a chipped-lens adapter and requires no camera menu changes as the camera 'sees' the lens. Of the M42 lenses,my current favourites are the Helios, Prinzflex, Asahi Pentax and Jupiter brands ( best Jupiter lens models are the alpha-numeric models and not numeric such as 11A instead of 11 as they're vastly superior and normally have curved aperture blades). Is any of this of use to you or have you since discovered all you need about using MF lenses on DSLR bodies?