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01-18-2012, 05:29 PM   #1
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Porst 55mm f1.2 - Need Surgery

I am the proud owner of a Porst 55mm f1.2 that I used all the times on my Kx. However, after few shots with the K5, the lens stop working. It only works wide open. I got a hold of an article posted here by a forum member and was able to open it. I found out that one small spring that closes the diaphragm broke. I have purhcased several broken lenses to canabalize them and get a spring, but none of them has one similar or close to it. I was able to put it back together and focus and shoot manually wide open on AV priority. Is there any expert in this forum to whom I can send the lens and get it fixed, maybe they have a way to get a new spring. I appreciate any help.

If you have one, beware, I think the K5 did the damage, I am not sure how. Also, if you have a broken Porst 55 f1.2 that you want to sell for parts, I am open (hopefully it is not the spring the broken piece). I have read a lot about these lenses and this seems to be the reason for them to stay wide open. In any case I am using it wide open, but miss the stop down a bit.

01-18-2012, 05:50 PM   #2
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This isn't an article, so I'm moving it to the lens forum

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01-18-2012, 05:58 PM   #3
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Contact Eric, I'm sure he can fix it. I just sent off my Cosina 1.2 to him to have it repaired. focus ring is spinning freely. He primarily works on Pentax gear, but will take a look at other gear.
01-18-2012, 08:32 PM   #4
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How do I contact Eric?

01-18-2012, 09:14 PM   #5
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Eric can be contacted at...
PS - he is highly recommended!!!

01-18-2012, 09:27 PM   #6
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Thanks, I did. I am waiting for his answer.:
Update said that the reason for getting the diaphragm stuck is oil, so he is cleaning the oil. I sent the lens and I am waiting for it.

Last edited by Pepe Guitarra; 02-05-2012 at 09:36 PM.

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