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Forum: Pentax K-30 & K-50
03-02-2015, 08:42 AM
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I have had this sort of thing with my adaptall lenses and adapters. Often it is fixed by giving the lens a "wiggle", or switching on and off.
Test that the lens + adapter is operating correctly in any case by taking some test shots.
As far as focus confirm goes, for that check you camera settings. That should not be affected by or dependent on whether the PKA is playing up or not (which you can confirm by taking it out of auto aperture mode and using Manual).
There are some more useful links on my page:
Information page on Tamron adaptall, adaptall-2 system and lenses
UPDATE: and I'd forgotten about this:
https://www.pentaxforums.com/forums/114-maintenance-repair-articles/50689-fix...a-adapter.html
I was just fiddling with two PKA's acquired with lenses that weren't registering. 10 secs scratching with a small screwdriver - fixed!
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Forum: Pentax SLR Lens Discussion
02-23-2015, 08:24 AM
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The aperture ring on Pentax-A SMC 50mm f/1.7 tends to give problems due to a design flaw. If you are not the 1st owner of the lens it may have been repaired and grease was used on the "A" pin internal mechanism. If this is the case, the pin will have to be disassembled and cleaned. This can be done carefully without removing the aperture ring itself (and risk losing the small ball bearing). A JIS screwdriver, fine tweezers and some lighter fluid is all that is required. Along with a reasonable amount of manual dexterity and infinite patience.
https://www.pentaxforums.com/forums/114-maintenance-repair-articles/88051-pen...ng-repair.html |
