Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
05-25-2011, 09:33 PM   #1
Site Supporter
Site Supporter

Join Date: Aug 2009
Location: Iowa
Posts: 60
Takumar 135 2.5 Bayonet

I got this lens for free but I notice it has threads on the exterior of the front of the lens. This had no lens cap and I don't know whether I am supposed to get something that goes on the threads or what? It has its own built in lens hood already. So what do I do for a cap etc.

05-25-2011, 09:48 PM   #2
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 5,495
I think they're just grip things to make it easier to pull the hood out. The hood is not really stable enough to screw something on to. Also they strengthen the hood. A lot of the hoods I've seen are dented or not round any more, because it's thin material.

The cap size is 52mm. If you get a cap with protruding "ears" like the one on the bottom right:

it'll keep the hood from sliding out when the lens is capped. Or get in your way when you want to slide the hood out.
05-25-2011, 10:29 PM   #3
Site Supporter
Site Supporter

Join Date: Aug 2009
Location: Iowa
Posts: 60
Original Poster
Thanks for the excellent information.
05-26-2011, 05:51 AM   #4
Veteran Member

Join Date: Mar 2011
Location: Eastern Kentucky
Posts: 416
If I understand correctly you have threads on the outside end of the lens?If so someone has a reverser screwed in which can be removed just like taking a filter off.

05-26-2011, 07:51 AM   #5

Join Date: Jan 2010
Location: Michigan
Photos: Gallery
Posts: 2,207
I have a Takumar (Bayonet) serial 5428131 that has a knurled grip on the end of the hood. That lens has "Japan"

Another, Serial 5655472 is "Made in Taiwan".
That lens has what looks like a thread, but close inspection shows it is just a set of parallel rings.
I think it is "half" of the knurl, maybe the tool that put the longitudinal hashes on, went out
of service on later Taiwan lenses.

These are nice, easy focus lenses for "distant" portraits.

  • 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!
cap, k-mount, lens, pentax lens, slr lens, threads
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Takumar 135 2.5 vs Super Tak 135 3.5, both bayonet mount, which is better? chongmic Pentax SLR Lens Discussion 7 04-09-2011 11:55 PM
For Sale - Sold: DA L 55-300, FA50/1.4, Takumar Bayonet 135/2.5, M50/2, Chinar 28/2.8 (US/UK/CA yurko_yr Sold Items 8 03-31-2011 04:39 AM
Bayonet Takumar 2.5/135 question Vranx Pentax SLR Lens Discussion 3 11-25-2010 02:51 PM
Underdog : Takumar bayonet 28 mm bdery Pentax SLR Lens Discussion 10 06-11-2009 05:02 PM
For Sale - Sold: Takumar (Bayonet) 135/2.5 Great Condition arpaagent Sold Items 9 12-31-2008 06:49 PM

All times are GMT -7. The time now is 10:41 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]