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10-28-2009, 04:42 PM   #1
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F*300mm help.. parts

Hi
I need to replace bearing ball for F ring clicks..

do u know the diameter of this ball?

10-28-2009, 10:32 PM   #2
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Measure the spring with a dial caliper and the ball should be a little larger. Or measure the hole with a dial caliper and the ball should be a little smaller. You can get steel balls at a bearing supply store. I don't know if they sell them that small though.
GP
10-29-2009, 04:04 AM   #3
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Or you could get yourself large magnet and roll it around in the carpet you lost it in.
10-29-2009, 04:39 AM   #4
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Just contact Pentax for it. They must have plenty.

10-29-2009, 05:01 AM   #5
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Since you are in Italy, you could try Microtools of Europe.
Here is their ball bearing page. micro-tools.de

And yes, just measure the hole it fits into and find one that will just fit inside.
10-29-2009, 07:07 AM   #6
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Original Poster
ok thx all!!

I think first af all will use a giant magnet ahuahuhua
10-29-2009, 11:27 AM   #7
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maybe somebody has the repair/service manual for this lens?
or any tutorial?
10-29-2009, 12:43 PM   #8
RaduA
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I bet right now you're a bit sorry for not choosing the DA* 300!

I hope you'll resolve the problem soon!

Radu

10-29-2009, 03:48 PM   #9
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Original Poster
it is not a real problem.. F ring works... but there are no clicks..
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