Forgot Password
Pentax Camera Forums Home

Show Printable Version Search this Thread
06-19-2013, 10:46 PM   #1
Eric Adamse

SMC Pentax-M 35mm F2.0 with sticky blades

Just got this lens back after I sold it regretly 5 years ago, it only got one problem: the diaphragmblades do not close quick enough when shooting what causes overexposure.

Googling around learns me this is a specific lack of this lens, so there must be a lot of experience in solving this. Is the problem caused by grease in the blades, is it a spring that fails? Blades look clean to me.

Can I repair it myself or should I better bring it to a service center?

I live in Utrecht / Holland.


06-19-2013, 11:07 PM   #2
carrrlangas's Avatar

Join Date: Mar 2012
Location: Joensuu (Finland)
Photos: Gallery
Posts: 1,750
I have an M35/2.8 with the same problem... I believe you have to dismantle the lens, clean the oil and put some greasse. It is easy if you have expirience in assemble/dessamble lenses... I got mine for cheap and the repair is expensive so I canīt justify for the moment but I would for that lens...
06-20-2013, 10:54 AM   #3
Eric Adamse

Lens cleaning

I payed 50 euros for it, I suppose servicing will cost more.... So I can try to disamble and clean it myself.

Has anyone some experience in doing this?
06-20-2013, 11:07 AM   #4
carrrlangas's Avatar

Join Date: Mar 2012
Location: Joensuu (Finland)
Photos: Gallery
Posts: 1,750
For what that lens is worth Iīd seriously consider sending it to a professional... It will cost you about the same as you payed for it and that is still a great price. Better even for a "new" lens after a technician takes care of it.

06-22-2013, 01:52 AM   #5
Eric Adamse


The lens has some fungus too, in bright light at full aparture it's terrible soft. Shining with a bright LED light through the lens I notice a bit milky glass... It might be fungus, it might be grease. I will take your advice and bring it to a professional for servicing.

  • 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!
blades, camera, lens, pentax help, smc pentax-m 35mm
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted - Acquired: SMC Pentax-M 35mm F2.8 Adam Sold Items 4 03-06-2013 02:14 PM
I need help with the repair off a SMC-M 35mm f2.0 henkvanzuylen Pentax Film SLR Discussion 9 11-13-2012 09:23 AM
sticky focus ring on SMC Pentax-DA 35mm F2.4 AL wedge Pentax SLR Lens Discussion 2 01-05-2012 01:22 PM
For Sale - Sold: Pentax SMC-M 50mm F2.0, SMC-DA 18-55mm F3.5-5.6 davidreilly3207 Sold Items 3 12-29-2011 11:22 AM
For Sale - Sold: SMC Pentax FA 35mm F2.0 AL (FA35/2.0) (Worldwide) deejjjaaaa Sold Items 8 07-20-2011 06:54 AM

All times are GMT -7. The time now is 04:20 PM. | 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]