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12-27-2012, 07:05 PM   #1
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Pentax A 50 1.4 lens dis-assembly advice needed

I have this A lens with a slow aperture.I removed the rear mount and have the black plate covering the inner workings of the aperture lever,as shown.I put a dab of alcohol
in the spot represented by the blue circle.It caused the blades to be nice and snappy(normal),When it dried it's back to being slow.I'm guessing it's gummed up under the plate.
I noticed,what looks like a spring,noted by the red circle.Does the plate just lift up?What happens after the plate is removed,with springs and such?I'm reluctant to go any further
without some advise.Anyone?


Last edited by 17dew; 06-24-2013 at 07:09 AM.
12-27-2012, 07:47 PM   #2
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My advice will be to put it back together and send it to a pro. It will cost you some money but it will be worth it.

I had one once that I took apart and I could never get it all back together. Its not complicated but those little springs and ball bearings are very easy to fly into orbit to never be seen again.

One person put up instructions (in a lot of detail) on how to take them apart and put them together...I got it apart no problem. The re-assembly caused me the problem.
12-27-2012, 07:52 PM   #3
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QuoteOriginally posted by alamo5000 Quote
My advice will be to put it back together and send it to a pro. It will cost you some money but it will be worth it.

I had one once that I took apart and I could never get it all back together. Its not complicated but those little springs and ball bearings are very easy to fly into orbit to never be seen again.
Yea,I've used Eric a couple of times,and may end up sending it to him.Those flying springs and things get me every time.
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