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06-20-2009, 06:55 PM   #1
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CZJ 135/3.5 sticky aperture

Hi, I'm a newbie in Pentax. I just got my CZJ 135 today. I am able to close the aperture, but unable to reopen it again unless I switch it from M to A mode on the lens. Is it because of the sticky blades, which frequently happen with this lens? Or other mechanical fault? Thanks for any answer in advance.

06-21-2009, 03:42 AM   #2
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you canīt open it en m-mode even if you turn the aperture ring?

Ludvik
06-21-2009, 05:09 AM   #3
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The Auto-Manual switch activates the aperature blades.
06-21-2009, 07:49 AM   #4
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I think that :

a) Oily blades; or

b) problem with the pin mechanism.

See Servicing The CZJ 135mm f/3.5 Lens

Perhaps can help you. I hope so.

06-21-2009, 08:04 PM   #5
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I can close but not open the aperture in M-mode.
06-21-2009, 08:07 PM   #6
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QuoteOriginally posted by xjjohnno Quote
The Auto-Manual switch activates the aperature blades.
I need to switch to A-mode first, then pick a f-number, and then switch back to M-mode. Even doing that, the aperture is not as accurate as my other Takumar lens.
06-21-2009, 08:10 PM   #7
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QuoteOriginally posted by estudleon Quote
I think that :

a) Oily blades; or

b) problem with the pin mechanism.

See Servicing The CZJ 135mm f/3.5 Lens

Perhaps can help you. I hope so.
I've checked up the link before, but unfortunately the pic corrupt on my computer.
I'll try to check it up on another computer.

Thanks guys, I hope it's something fixable.
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