Forgot Password
Pentax Camera Forums Home

View Poll Results: Which K mount F1.2 lens would/have you chosen?
Pentax-A 50mm F1.2 3662.07%
Pentax 50mm F1.2 813.79%
Cosina 55mm F1.2 58.62%
Porst Color Reflex 55mm F1.2 23.45%
Other F1.2 glass attached to a K mount 35.17%
I'm not into F1.2 glass. 46.90%
Voters: 58. You may not vote on this poll

Show Printable Version Search this Thread
04-07-2010, 07:32 AM   #1
Site Supporter
Site Supporter
Clinton's Avatar

Join Date: Feb 2010
Location: Salt Lake City, UT
Photos: Gallery | Albums
Posts: 1,846
Which K mount F1.2 lens would/have you chosen?

What is/was your selection of F1.2 glass and why?

I've only included the K mount glass on the poll.

04-07-2010, 11:05 AM   #2
Veteran Member
Pentaxor's Avatar

Join Date: May 2009
Location: Vancouver, B.C.
Photos: Gallery
Posts: 6,513
A version. why? aperture control (very important for me, especially with slight adjustments and metering). 9 blades, when stopping down aperture, better bokeh IMO.
04-07-2010, 12:29 PM   #3
Senior Member
older not wiser's Avatar

Join Date: Dec 2009
Location: East Yorkshire
Posts: 120
The A series 50 1.2 was superb. Mine died with my P50 when it fell off the end of the back of a ferry on the way back from France 15 years ago. I never replaced it and I have missed it.
04-07-2010, 12:34 PM   #4
Inactive Account

Join Date: Mar 2007
Location: Nove Zamky, Slovakia
Photos: Gallery | Albums
Posts: 7,181
I voted for A50/1.2 though I'm quite happy with the K series

04-07-2010, 12:36 PM   #5
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 16,126
I presently own only F1.4 lenses, or slower, and unless I happen across an F1.2 cheap, I doubt I woud buy one.

I jsut don't have the need/use for it with what I do.

as a result, I would say that if presented with multiple options at the same time, and price, I would take "A" then"K" then other K mount, then other F1.2 with a mount conversion.

but sinde I am not planning to buy one I won't vote, because it would skew the results
04-07-2010, 12:41 PM   #6
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,298
I have the A series because I got a very good price on it. Optically, and aperture wise there shouldn't be any difference in the 2. The A of course has the contacts which is a plus. However, I would hesitated on the k if the price was right. I posted some info in a couple of threads on price sales break down on these.

Edit: Here is the post I made a while back.

The average I have for the A is $494 with a range of $300-685 based on 14 lenses from fleabay, KEH, and here.

The k averages about $381 with a range of $153-500 for 28 lenses.

That doesn't count the person that sold about 30 of the A on ebay for an average of $285 and 9 of the k for $217. He also sold 5 K1000 with f1.2 A attached for about $100 before he realized what they were.

Last edited by Blue; 04-07-2010 at 12:50 PM.
04-07-2010, 12:46 PM   #7
Veteran Member
dgaies's Avatar

Join Date: Oct 2009
Location: Maryland / Washington DC
Posts: 3,917
I actually have a pair of A50/1.2 lenses at the moment as I accepted one in trade for a lens I sold (despite already owning one).

I really do like having the "A" function, although I've never tried a K50/1.2, nor any of the other options, so I guess it would be hard to say if I might prefer one of the others if I tried them.
04-07-2010, 01:52 PM   #8
Senior Member

Join Date: Mar 2009
Location: Copenhagen
Posts: 258
I have a K 50 and the Porst. I prefer the Porst wide open, but the K stopped down.

04-07-2010, 02:21 PM   #9
Site Supporter
Site Supporter
Rorschach's Avatar

Join Date: Nov 2007
Location: Kuusamo, Finland
Photos: Gallery
Posts: 649
I got the Pentax K version because the A ones are too expensive for their usage value IMO.
04-07-2010, 04:13 PM   #10
Site Supporter
Site Supporter
gofour3's Avatar

Join Date: Oct 2008
Location: Vancouver, Canada
Posts: 6,753
K50/1.2 as I have K series film bodies and have no use for the "A" contacts. The K series version is also less expensive.
04-08-2010, 04:16 AM   #11
Senior Member

Join Date: Mar 2010
Location: Gold Coast, Australia
Photos: Gallery
Posts: 167
i will choose the a 50 1.2 if i could get one 1.2 lense. heard that the a50 1.2 is very good
04-08-2010, 04:23 AM   #12
Veteran Member
TOUGEFC's Avatar

Join Date: Nov 2009
Location: Brisbane
Photos: Gallery
Posts: 3,561
Voted for a50, after recently buying a a50 1.7 (and loving it) i find the auto aperture is a great useful feature of these old lens.
04-08-2010, 09:49 AM   #13
Veteran Member
macTak's Avatar

Join Date: Apr 2010
Photos: Gallery
Posts: 759
I got the K50 f1.2 simply because I got a good deal on it ($175 with some condition niggles). The A does have that extra aperture blade, which is nice, but I'd not want to spend exorbitant amounts for that little extra that f1.2 gives you.
04-08-2010, 11:56 AM   #14
Forum Member

Join Date: Feb 2008
Location: Finland
Posts: 77
I have Vivitar Series 1 55mm f1.2 (K-mount, filter 58mm)

That is a very rare lens. I'm not totally sure but I'm guessing that it's optically quite similar as Cosina 55mm f1.2...but at's nicer looking lens
04-09-2010, 06:08 PM   #15
Site Supporter
Site Supporter
Clinton's Avatar

Join Date: Feb 2010
Location: Salt Lake City, UT
Photos: Gallery | Albums
Posts: 1,846
Original Poster
QuoteOriginally posted by Harmonica Quote
I have Vivitar Series 1 55mm f1.2 (K-mount, filter 58mm)

That is a very rare lens. I'm not totally sure but I'm guessing that it's optically quite similar as Cosina 55mm f1.2...but at's nicer looking lens
I didn't know there was a Vivitar f1.2 K mount. I'd have added it to the poll.

Where did you find this oddity?

  • 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!
f1.2, glass, k-mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
K-x lens mount with old k-mount lenses sipper Troubleshooting and Beginner Help 9 03-18-2010 05:45 PM
Lens mount can use with Pentax mount espanola Pentax SLR Lens Discussion 13 02-24-2010 04:48 PM
max lens mount/tripod mount weight soycory Pentax DSLR Discussion 1 10-28-2009 12:38 PM
Is it possible to mount an old CCTV C mount lens to my k20d? WiseOx Pentax SLR Lens Discussion 2 07-15-2009 03:01 PM
Change vivitar FD mount lens to K mount? meszidik Pentax SLR Lens Discussion 4 09-12-2008 09:59 AM

All times are GMT -7. The time now is 06:00 AM. | See also:, 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?
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]