Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
11-20-2011, 06:22 PM   #1
Inactive Account




Join Date: Nov 2011
Photos: Gallery
Posts: 4
K-10d lens mount help

I dug out an old Spiratone F400 6.3 to try on my K-10d but I don't have any mount adapters. The lens has internal threading on the tube. Any ideas about which mounts I need to get it working on my K-10d.


Last edited by sagecreeper; 11-20-2011 at 06:24 PM. Reason: correct typo
11-20-2011, 06:45 PM   #2
Administrator
Site Webmaster
Adam's Avatar

Join Date: Sep 2006
Location: Arizona
Photos: Gallery | Albums
Posts: 43,182
Sounds like a screwmount: Pentax Mount Adapter K 30120 B&H Photo Video
11-20-2011, 07:08 PM   #3
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
That Spiratone (and all the other names it went under) is an M42 screw-mount. But the mount is screwed onto the barrel -- which is also threaded -- and the mounts often come off. If there is no chrome part then you're actually missing the mount. I suspect the other threads are like a T-mount which is commonly used on telescopes I think. Just something to watch out for...
11-20-2011, 07:08 PM   #4
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,770
Internal thread on the lens? Can you post a picture or measure the thread diameter? Might be a T-mount or part of a T-mount.

11-20-2011, 07:13 PM   #5
Pentaxian
rvannatta's Avatar

Join Date: Aug 2007
Location: Apiary, Oregon
Photos: Gallery
Posts: 1,176
QuoteOriginally posted by vonBaloney Quote
That Spiratone (and all the other names it went under) is an M42 screw-mount. But the mount is screwed onto the barrel -- which is also threaded -- and the mounts often come off. If there is no chrome part then you're actually missing the mount. I suspect the other threads are like a T-mount which is commonly used on telescopes I think. Just something to watch out for...
the things I bought from Spiratone tended to be T mount.
11-20-2011, 07:16 PM   #6
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
I have that lens under a different name -- Tele-Lentar I think -- and the m42 mount will often try to come unscrewed from the barrel. The internal threads do look T-mountish, but I don't have a T adapter ring so I'm not sure.
11-20-2011, 07:47 PM   #7
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
My current Spiratone Telephoto 400 f/6.3 is definitely T-mount. So was the one I had 35 years ago. A T-mount or T2 lens has the same thread diameter as M42, but a different pitch; and the lens-to-frame (film or sensor) distance is longer than M42. DO NOT TRY TO FORCE AN M42 ADAPTER ONTO THIS LENS!! T2-PK adapters are cheap and common.
11-20-2011, 07:51 PM   #8
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
QuoteOriginally posted by RioRico Quote
My current Spiratone Telephoto 400 f/6.3 is definitely T-mount. So was the one I had 35 years ago. A T-mount or T2 lens has the same thread diameter as M42, but a different pitch; and the lens-to-frame (film or sensor) distance is longer than M42. DO NOT TRY TO FORCE AN M42 ADAPTER ONTO THIS LENS!! T2-PK adapters are cheap and common.
Does that have a mount on the barrel or are the threads on the barrel itself? Mine has an M42 mount and I've seen it many times with same. The M42 mount that is on mine is not an adapter -- it is supposed to be permanent but the little screw is busted or loose.

11-21-2011, 02:14 AM   #9
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
QuoteOriginally posted by vonBaloney Quote
Does that have a mount on the barrel or are the threads on the barrel itself? Mine has an M42 mount and I've seen it many times with same. The M42 mount that is on mine is not an adapter -- it is supposed to be permanent but the little screw is busted or loose.
Mine (past and present) have T-mount threads on the barrel. I haven't seen any that are M42-native. I thought Fred Spira was too cheap to have variant versions made. If your M42 mount is knurled and has|had a grub screw, then it's probably T or T2 also.

Last edited by RioRico; 11-21-2011 at 09:27 AM.
11-21-2011, 09:09 AM   #10
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
Yeah, mine is same, but the m42 mount looks like it came with it and was meant to be attached permanently rather than just a T-mount adapter ring. That lens comes under at least a dozen different brand names -- not sure who actually made it.
11-21-2011, 06:35 PM   #11
Inactive Account




Join Date: Nov 2011
Photos: Gallery
Posts: 4
Original Poster
The threads are internal in the tube. I don't have any mounts I can find so basically I have the lens tube with internal threading. I'll try to get a picture up and rolling. If it is a T-Mount d I screw it into the tube threads and it attaches to the camera. Sounds too simple.
11-21-2011, 06:47 PM   #12
Inactive Account




Join Date: Nov 2011
Photos: Gallery
Posts: 4
Original Poster

Here are the threadings on the tube. Sorry for the pic size.
11-21-2011, 11:57 PM   #13
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,264
QuoteOriginally posted by sagecreeper Quote
Here are the threadings on the tube. Sorry for the pic size.
Female threads? Non-standard, and definitely not M42. That looks like it needs a special adapter; all that I know of would need male threads on the tube.
11-22-2011, 12:16 AM   #14
Pentaxian




Join Date: Oct 2011
Location: Savannah, GA
Posts: 5,002
I took a closer look at mine. I guess it is just a Tmount with an M42 ring. The one in the picture looks like the entire Tmount has been removed. Mine has some screws near the end of the barrel that look as if you removed them would allow unscrewing of the Tmount from inner threads. But if you did that it looks like it would take that whole inner grooved area with it, which is still shown in the picture above. Don't know what's going on there, but it sure seems like you're missing a part or two.
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!
k-10d, k-mount, lens, mount, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Einstellung Pentax K 10D chickenherby Troubleshooting and Beginner Help 5 07-15-2011 10:11 PM
New PF user, JUST got K-5 to replace K-10D GrantMeThePower Pentax K-5 16 07-01-2011 07:30 AM
Lense mount help? rtrampe30 Troubleshooting and Beginner Help 6 12-24-2010 05:52 AM
Time exposures with K-10D. flashcactus Troubleshooting and Beginner Help 6 05-30-2010 10:08 AM
teleconverter for K mount lense prblack.6206 Pentax Camera and Field Accessories 6 05-05-2008 06:59 AM



All times are GMT -7. The time now is 11:46 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