Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-10-2010, 06:29 PM   #1
Pentaxian
ducdao's Avatar

Join Date: Dec 2009
Location: Montreal/Vermont
Posts: 2,160
Does Mamiya/Sekor 50mm f1.2 really exist?

One of my friends says he has an old lens sitting in his closet for years and wants to get rid of it by selling it to me. I asked for the lens description and he told me Mamiya/Sekor 50mm f1.2! I Googled but couldn't find any info on any lens from Mamiya that is f1.2. I wonder if he meant 1:2 or 1.2.

I asked him a couple times and he kept saying 1.2

Can someone shed some lights into this?

Thanks!

01-10-2010, 06:35 PM   #2
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 5,688
I thought the M42 mount was not wide enough for the rear element of an f1.2 lens. I have seen a few of the M/S 50mm f2 lenses so there's definitely a possibility for confusion.
01-10-2010, 06:36 PM   #3
Senior Member
flockofbirds's Avatar

Join Date: Aug 2009
Location: Oregon, USA
Photos: Gallery
Posts: 178
He probably meant 1:2
01-10-2010, 06:43 PM   #4
Pentaxian
ducdao's Avatar

Join Date: Dec 2009
Location: Montreal/Vermont
Posts: 2,160
Original Poster
Yes, I think the same too. Probably 1:2.

Waiting for his pictures of the lens for final confirmation. I was so excited when I heard it was a f1.2

01-10-2010, 06:43 PM   #5
Veteran Member
RawheaD's Avatar

Join Date: Dec 2008
Location: MA, USA
Photos: Gallery
Posts: 831
1:2


Very common mistake among average joes.
01-10-2010, 06:48 PM   #6
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,297
The may have had a 55mm f1.2 in a joint venture with Tomioka. Tomioka made a 55mm f1.2 in m42 and there are some Chinon Tomioka and Tomioka Revuenon versions out there.
01-10-2010, 06:51 PM   #7
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,297
QuoteOriginally posted by Just1MoreDave Quote
I thought the M42 mount was not wide enough for the rear element of an f1.2 lens. I have seen a few of the M/S 50mm f2 lenses so there's definitely a possibility for confusion.
There were 55mm f1.2 m42 lenses. Tomioka was in on many of them.



Note: That is not mine

http://www.flickr.com/photos/norm_p/2550965156/

Here is a link to the Yashinon Tomioka version: http://www.pbase.com/recbo/image/88669369

and the Porst version: http://www.mflenses.com/gallery/v/japenese/othermaker/ports_55mm_f1_2/porst_55mm_f1_2-01_001.jpg.html
& http://www.mflenses.com/gallery/v/japenese/othermaker/ports_55mm_f1_2/

Last edited by Blue; 01-10-2010 at 06:57 PM.
01-10-2010, 06:56 PM   #8
Pentaxian
ducdao's Avatar

Join Date: Dec 2009
Location: Montreal/Vermont
Posts: 2,160
Original Poster
Now for sure he has made a mistake. Just hoping the mistake is at the focal number instead of aperture number

01-10-2010, 07:02 PM   #9
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,297
QuoteOriginally posted by ducdao Quote
Now for sure he has made a mistake. Just hoping the mistake is at the focal number instead of aperture number
You definitely need to verify this because the odds are it is a 50mm f2. However there is a chance it is a f1.2 or f1.4 55mm.
01-15-2015, 04:52 AM   #10
New Member




Join Date: Jan 2015
Posts: 1
Mamiya sekor 1.2

One of the guys at my camera club brought along a box of "unwanted bits" featuring old m42 lenses. I said I'd be interested and took the box home. Amongst other items was a Mamiya Sekor 50mm 1.2. Definitely 1.2 - very large piece of glass. As it was the aperture blades were sticking and worst of all there was a big scratch in the front element. The only lens he gave me which actually functions is a carl zeiss 50mm 1.8 pancolar. I'm really excited about this, The glass is perfect and look forward to trying it once I've gotten rid of the pin. (All the other unusable lenses I'm taking the elements out of to make a zany kind of mobile.
Real shame about the 1.2, but there it is - they were definitely produced.
01-16-2015, 07:09 AM   #11
Veteran Member




Join Date: Jul 2013
Posts: 1,457
QuoteOriginally posted by ducdao Quote
One of my friends says he has an old lens sitting in his closet for years and wants to get rid of it by selling it to me. I asked for the lens description and he told me Mamiya/Sekor 50mm f1.2! I Googled but couldn't find any info on any lens from Mamiya that is f1.2. I wonder if he meant 1:2 or 1.2.

I asked him a couple times and he kept saying 1.2

Can someone shed some lights into this?

Thanks!
Having shot Mamiya for 3 decades.....I CAN ASSURE YOU......IT DOESNT EXIST !
Mamiya shooters wanting that fast had to use a Auto Chinon Tomioka 55 1.2
This may be in disagreement with a couple members on here....so If Im wrong ....... Show me with a picture of one. ???
I guarantee you.....Its a 1:2 Or its a 55 and not a 50......keep your fingers crossed for the 55 Tomioka.

Last edited by Dlanor Sekao; 01-16-2015 at 08:02 AM.
01-16-2015, 10:53 AM   #12
Pentaxian




Join Date: May 2008
Location: London, UK
Posts: 1,206
Looks like the m42 Tomioka 55mm F1.2 can command very high prices - or at least someone thinks so
Chinon 55mm f1.2 Tomioka M-42 mount #101561 | eBay
01-16-2015, 11:01 AM   #13
Veteran Member
aleonx3's Avatar

Join Date: Jul 2007
Location: Brampton, Ontario
Photos: Gallery | Albums
Posts: 3,996
I have the Mamiya/Sekor 50 1:2 lens and 1:1.4, I would say it would be extremely rare that it is a 55/f1.2 as others have mentioned here. I have seen Porst, Chinon, Revuenon, Yashinon 55/f1.2 mostly made for and with design by Tomioka.
01-16-2015, 11:38 AM   #14
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,376
Sometimes the colon (':') on the name plate gets messed up so it actually does look like it says 1.2. I wouldn't be surprised if the 55/1.2 came under the M/S name (as did some of the other Tomioka lenses). One tell-tale sign of the real 1.2 is the rear element has a chunk missing out of it (it is not a full circle) -- that's how it is supposed to be, it is not damage.
01-16-2015, 12:10 PM   #15
Pentaxian




Join Date: May 2008
Location: London, UK
Posts: 1,206
If you look carefully at some of the other shots of this lens you can see that there is definitely a "1.4" to the RHS of the "2" on the aperture ring, and there is what looks a "1.2" to the RHS of the "1.4" - so I think this is an F1.2 lens

---------- Post added 01-16-15 at 07:38 PM ----------

QuoteOriginally posted by vonBaloney Quote
Sometimes the colon (':') One tell-tale sign of the real 1.2 is the rear element has a chunk missing out of it (it is not a full circle) -- that's how it is supposed to be, it is not damage.
That also seems to be the case for this lens because one of the other shots does show the "chunk" .
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
50mm, f1.2, k-mount, lens, mamiya/sekor, pentax lens, rhs, shots, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Why no love for Mamiya Sekor? Shamwow Pentax SLR Lens Discussion 68 01-19-2019 04:16 PM
Be the judge; Mamiya-Sekor 55mm 1.4 vs Super-Takumar 50mm 1.4 Yaro Pentax SLR Lens Discussion 5 07-01-2010 10:56 AM
problem with mamiya/sekor on spottie F? ragamuffin1171 Pentax SLR Lens Discussion 4 05-24-2010 04:10 PM
New Arrivals: Mamiya/Sekor 55/1.8 (Third of three) stevebrot Pentax SLR Lens Discussion 2 03-01-2009 10:42 PM
Mamiya/Sekor M42 lenses frederik9111 Pentax SLR Lens Discussion 8 03-23-2008 02:42 PM



All times are GMT -7. The time now is 11:37 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top