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Help with mount identification - Pentax K?
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PostPosted: Fri Jan 30, 2015 4:13 pm    Post subject: Help with mount identification - Pentax K? Reply with quote
Can someone please help me with identifying this mount? Very Happy



It's attached to a Sigma 600mm f/8 mirror lens. The seller didn't have a clue what he had, but it's in very good condition as far as I can see and has all five filters (the seller missed the one mounted in the lens). There is no mark,engraving or label indicating the mount.

My plan is to use this with either my X-E2 or X-Pro1.

It's not EOS, Minolta or QBM as far as I can tell referring to the lenses/adapters I already have.

I think it's Pentax K mount.

All help very much appreciated, thanks.


PostPosted: Fri Jan 30, 2015 5:11 pm    Post subject: Reply with quote
It doesn't look like K to me but I can't help with identity. Embarassed


PostPosted: Fri Jan 30, 2015 5:32 pm    Post subject: Reply with quote
Looks like PK to me, with no aperture linkages. As is to be expected in a mirror lens.
Giveaway is the location of the hole for the lock pin.
On PK it is opposite a flange, like this, on Nikon it is between flanges.


PostPosted: Fri Jan 30, 2015 5:48 pm    Post subject: Reply with quote
Thanks guys. I'll order an FX:PK adapter and let you know how I get along with it.


PostPosted: Fri Jan 30, 2015 5:52 pm    Post subject: Reply with quote
The lock pin is in the right spot, but the red dot is in the wrong spot....
This image borrowed from the net.


PostPosted: Fri Jan 30, 2015 5:55 pm    Post subject: Reply with quote
I din't think it's PK. the red alignment dot on a PK is against a corner of a flange lug, and with the red do in that position the locking slot / hole would be at 12 o clock. But if you ignore the red dot on the pictured lens and work from the locking pin hole - then I agree, it's probably PK. with the red alignment dot in the wrong place - according to the four PK lenses I have in front of me Confused


PostPosted: Fri Jan 30, 2015 5:59 pm    Post subject: Reply with quote
Right on Lloyd,the red dot is why I thought not Pentax. Rolling Eyes


PostPosted: Fri Jan 30, 2015 6:07 pm    Post subject: Reply with quote
The first lenses I checked it against where both Ricoh / PK lenses that I have chopped down the baffle and removed the pin, they were Vivitars made for Ricoh, and the dot is in the same place as the Pentax lenses I then looked at. And I've just looked at the Chinon's - same place as Pentax. That lens could be very confusing when trying to mount on a Pentax.


PostPosted: Fri Jan 30, 2015 6:18 pm    Post subject: Reply with quote
Well, its not Nikon, Olympus, Canon FD/FL or EOS, Minolta, Konica, Miranda, Rollei, Exakta, Topcon, Contax/Yashica, Petri, Fujica bayonet or any of the others mentioned.

The only SLR mounts I know of with a lock pin like that are PK and Praktica B, and Praktica B is most unlikely and doesnt have the red dot there either.

If not PK its something really odd.


PostPosted: Fri Jan 30, 2015 6:55 pm    Post subject: Reply with quote
Flange shape is definitely PK, but alignment dot is in the wrong place and PK should not really have that little screw between the flanges.


PostPosted: Fri Jan 30, 2015 7:05 pm    Post subject: Reply with quote
I was thinking PB


PostPosted: Fri Jan 30, 2015 8:34 pm    Post subject: Reply with quote
Found it, Sigma SA
http://www.kehblog.com/2011/12/lens-mount-guide-part-3.html


PostPosted: Fri Jan 30, 2015 8:52 pm    Post subject: Reply with quote
Right, that one is a surprise.


PostPosted: Fri Jan 30, 2015 9:06 pm    Post subject: Reply with quote
Well done! and thanks..

.. I think .. time see if I can find a FX-SA adapter Shocked


PostPosted: Fri Jan 30, 2015 9:12 pm    Post subject: Reply with quote
Adapter is available! Very Happy

Pentax K adapter order cancelled. New order placed for Sigma SA adapter..


PostPosted: Fri Jan 30, 2015 9:45 pm    Post subject: Reply with quote
Is this not why we LOVE MFlenses Very Happy


PostPosted: Fri Jan 30, 2015 11:42 pm    Post subject: Reply with quote
Damn, Sigma. Shocked I guess it might fit a PK mount if the diameters are about the same.


PostPosted: Sat Jan 31, 2015 6:39 am    Post subject: Reply with quote
Glad to help.
We really should put together a definitive lens mount ID thread.


PostPosted: Sat Jan 31, 2015 9:15 am    Post subject: Reply with quote
Lloydy wrote:
Damn, Sigma. Shocked I guess it might fit a PK mount if the diameters are about the same.

From what I've read it works the other way round, ie PK lenses will mount onto a SA body.


PostPosted: Sat Jan 31, 2015 9:19 am    Post subject: Reply with quote
Lightshow wrote:
Glad to help.
We really should put together a definitive lens mount ID thread.

That would be useful. Of the guides I could find online they all lacked at least two or three mounts that I was aware of. Perhaps include a reference of which systems each mount can be used with an adapter for as well. And notes on the fine details of telling very similar mounts apart - like a bird book with a "could be confused with" section.


PostPosted: Sat Jan 31, 2015 10:18 am    Post subject: Reply with quote
B & H or one of the American camera stores has a good guide to mounts on their website. I'v probably got it bookmarked ......somewhere..


it's KEH - and here's a link. There's three pages, the link to the next page is a bit small and obscure at the bottom of the pages.

http://blog.keh.com/tags/lens-mounts/



..

Last edited by Lloydy on Sun Feb 05, 2017 4:00 pm; edited 1 time in total


PostPosted: Sat Jan 31, 2015 7:27 pm    Post subject: Reply with quote
I found the KEH version, and also this one http://rick_oleson.tripod.com/index-99.html

But they're both incomplete and lacking the sort of detail needed to, for example, differentiate between Pentax K and Sigma SA mounts (relative positions of lens lock recess and red dot). I'm sure we could do better.

Ideally you'd want a system able to show two or more mounts alongside each other with the differences highlighted.


PostPosted: Sat Jan 31, 2015 10:46 pm    Post subject: Reply with quote
I'm working on one but most of the images are pulled from the net and probably copyrighted. My plan is to make a PDF available for download. Watch the forum for an announcement. And if anyone has a good photo of an obscure mount, specially 6x6 cameras, let me know.


PostPosted: Sun Feb 01, 2015 3:15 am    Post subject: Reply with quote
Borrowed images are not ideal, A Creative Commons license would be better with credit to MFlenses.


PostPosted: Sun Feb 01, 2015 12:54 pm    Post subject: Reply with quote
I started to take pictures of mounts and used some black cardboard with holes slipped over the mount so the bayonet flange poked through, the pictures were a lot clearer. But then I lost the pictures in a computer crash.
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