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Forum: Troubleshooting and Beginner Help 07-23-2013, 08:29 AM  
Sticky aperture blades?
Posted By mn_raf123
Replies: 17
Views: 19,206
Could you please describe what the lever on the rear of the lens looks like? What is the 'diaphragm' that you refer to?

EDIT: Nevermind, I've found the lever. How quickly should the blades snap shut?
Forum: Troubleshooting and Beginner Help 07-23-2013, 07:21 AM  
Sticky aperture blades?
Posted By mn_raf123
Replies: 17
Views: 19,206
Hi all, could someone please give me a definition of what 'sticky aperture blades' are? I'd also like to know how to:
  • Prevent sticky aperture blades

  • Identify sticky aperture blades

  • Fix/remedy sticky aperture blades

I'm posting this because I have a Pentax-A 50mm f/2.8 Macro lens which has oily aperture blades but I am unsure if they are 'sticky' (though I have read that I should get this remedied regardless of whether it is sticky or not) and I've recently bought a Pentax-M 35mm f/2.8 lens which is notorious for sticky aperture blades. If anyone has any relevant experience with any of these two lenses (or any similar lenses) could you also post your experience(s)?


Regards,


Michael
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