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04-04-2014, 01:51 PM   #1
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What mount is this?

Hello all,

For a few Euros I found my self an adapter on the fleamarket, which I suspected to be two adapters screwed together. At home it took some force, but I was right!

The small ring was an original K-M42 adapter.

The bigger ring has a camera side that goes into my M42 Zenit E perfectly. It has a aperture actuation pin that you sometimes see on newer M42 lenses with auto aperture.

The camera side has the text "FOR PENTAX" and patent number 3500735. This refers to a general adapter patent.

The lens side has a bayonet type mount. The three tabs are on the outside. This is opposing that of the Pentax K mount, where the tabs on the lens side are on the outside. The flange has a diameter of 51mm. The tabs have a diameter of 54mm.

Anybody what kind of lens fits on this?

I will post a photo later.

04-04-2014, 02:00 PM   #2
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It is for the Tamron Adaptall series of lenses, should say Tamron on there too.
04-04-2014, 02:39 PM   #3
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No Tamron indication there. Just "FOR PENTAX". Seems odd, because pentax isn't the only camera which used the M42 side...


Any chance it could be for P645 systems? Or even P6x7 systems?
04-04-2014, 02:42 PM   #4
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Some photos would really help.

04-04-2014, 03:25 PM   #5
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Canon FD mount looks somewhat like an Adapt-All.
04-04-2014, 03:39 PM   #6
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QuoteOriginally posted by JohntheThird Quote
No Tamron indication there. Just "FOR PENTAX".
My Tamron Adaptall-2 M42 adapter says "For Pentax" as well. Back in the day, M42 was commonly referred to as Pentax mount, Praktica/Pentax mount, or sometimes just Praktica mount. (There were a lot of Praktica cameras back then.)

As for Pentax 645 or 6x7...neither of those mounts have a female bayonet.


Steve

---------- Post added 04-04-14 at 03:41 PM ----------

QuoteOriginally posted by AquaDome Quote
Canon FD mount looks somewhat like an Adapt-All.
True, except that an adapter would emulate the breach-lock as well.

Last edited by stevebrot; 04-04-2014 at 03:44 PM.
04-04-2014, 04:04 PM - 2 Likes   #7
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Another "what mount is this" thread, without a picture ... I might understand this for a literature forum, but on a photography forum?
04-05-2014, 12:59 AM   #8
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Now with pictures!

I am sorry all, I did not have any camera with me - and my dumbphone does not allow uploading pictures.


Here are some pics. Taken with my new 13 bladed Helios 44 silver. Need to get used to that lens, so sorry if not perfectly clear.


If it is an Adaptall, what would be the most interesting lens to get?

Attached Images
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
View Picture EXIF
PENTAX K-5  Photo 
04-05-2014, 02:51 AM   #9
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That is a Tamron Adaptall to M42 adapter.
04-05-2014, 08:36 AM   #10
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Definitely a Tamron Adaptall M42 mount,. The green dot is the index mark to the lens.


Steve
04-05-2014, 08:52 AM   #11
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To use that with a K mount camera you'll either need to modify the mount to keep the pin pressed all the time or use lenses with an A/M switch, which only the early Adaptalls have. Strange that it doesn't say Tamron on it, maybe it is an earlier one than mine.
04-05-2014, 08:53 AM   #12
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Given the filing date on the patent it's most likely the Adapt-a-matic mount (introduced in 1969), but it could be the Adaptall (introduced 1973)

Patent US3500735 - Adapters for automatic lens system usable with different reflex cameras - Google Patents

History of Tamron

The original assignee of the patent is listed as Taisei Kogaku Kogyo Co., Ltd which was later renamed Tamron Co., Ltd. in April 1970
04-05-2014, 10:20 AM   #13
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AD-1 adaptall M42 mount. The font style is distinctive of the 1st gen adaptall. No tabs/ears on a M42 and the AD-1's typically had only one. The small squarish plate pushes against a small wheel for aperture actuation.

Adaptamatic is completely different - a screw threaded sleeve attaches the mount, not a bayonet.

More info (including mod the pin advice):
Information page on Tamron adaptall, adaptall-2 system and lenses
04-05-2014, 03:30 PM   #14
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This is not good for my LBA...
So what lens would be worth looking out for?

Last edited by JohntheThird; 04-05-2014 at 03:36 PM.
04-05-2014, 07:12 PM   #15
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QuoteOriginally posted by JohntheThird Quote
This is not good for my LBA...
So what lens would be worth looking out for?
What do you want to look for? Tamron had an extensive line of Adaptall and Adaptall-2 lenses. There is an Adaptall lens club on this site:

https://www.pentaxforums.com/forums/122-lens-clubs/59769-adaptall-mount-club-tamron.html

You may also want to take a look at the listings and reviews at Adaptall-2.org:

adaptall-2.org

As noted above, your mount will probably require modification such that the actuator pin is always depressed (lens always stopped down) in order to shoot stopped down rather than always wide open. Or you can simply buy the K-mount adapter. The one without "A" contacts is usually about $20.


Steve
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