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06-01-2016, 03:35 PM   #1
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Need help to assemble A50 1.7 - small metal pieces

Was trying to cleaning A50 1.7 lens following some youtube video. But has pieces of metal and spring come out. and my pieces are not like exact parts in YouTube.

Please some expert take a look at the photo.

I suppose these pieces should all go to the red circle place, but how? no idea how to put there there pieces together.

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06-01-2016, 03:55 PM   #2
UMC
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I have pictures of the same part in the smc Pentax-A 50/1.4. I would guess, that you are missing the tiny ball. The parts should be seated as shown in my pictures. However, since the body of the 1.7 is made of plastic as opposed to the 1.4 which is made of metal, I guess, the small angled sheet metal part shown in your pictures should be seated below the assembly visible in my pictures.
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06-01-2016, 03:59 PM   #3
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QuoteOriginally posted by UMC Quote
I have pictures of the same part in the smc Pentax-A 50/1.4. I would guess, that you are missing the tiny ball. The parts should be seated as shown in my pictures. However, since the body of the 1.7 is made of plastic as opposed to the 1.4 which is made of metal, I guess, the small angled sheet metal part shown in your pictures should be seated below the assembly visible in my pictures.
your pics are very helpful. thanks. I guess the lens I bought is missing the head. It still worked though.
06-01-2016, 04:00 PM   #4
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https://www.pentaxforums.com/forums/114-maintenance-repair-articles/88051-pen...ng-repair.html

Without the pin you won't be able to set "A" mode on a Pentax DSLR and you will have to treat it as a K or M series lens and use green button stop down metering.

06-01-2016, 07:32 PM   #5
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QuoteOriginally posted by Not a Number Quote
https://www.pentaxforums.com/forums/114-maintenance-repair-articles/88051-pen...ng-repair.html

Without the pin you won't be able to set "A" mode on a Pentax DSLR and you will have to treat it as a K or M series lens and use green button stop down metering.
thanks, put everything back. skip the spring and head, surprisingly auto aperture is working.
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