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04-10-2015, 12:58 PM   #16
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QuoteOriginally posted by BigMackCam Quote
Can you still use the lens in M and Av modes
I usually use it in M mode with exposure based on trial and error when the strange behavior happens.


Steve

05-09-2015, 08:39 AM   #17
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QuoteOriginally posted by stevebrot Quote
You should only short the "data/digital info" contact to avoid sending mixed signals to the body. See image below from Dimitrov's K-mount site:




Steve
As there is a lip around the outside of the lens on my Chinon 200mm, I scraped the anodise off in the area as shown by Stevebrot's post, (didn't see a need to stick conductive adhesive tape to the lens) and it's now stopping down a treat.
05-09-2015, 09:40 AM   #18
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Update: woohoo! I have a working 28mm lens now! Stunning IQ!

I have a chinon 28mm f2.8 that behaves exactly like described here. So all it takes is for me to scrape the paint off the mount?

Last edited by CNunez; 05-09-2015 at 11:11 AM.
05-16-2015, 02:28 AM   #19
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QuoteOriginally posted by CNunez Quote
Update: woohoo! I have a working 28mm lens now! Stunning IQ!

I have a chinon 28mm f2.8 that behaves exactly like described here. So all it takes is for me to scrape the paint off the mount?
It worked for me. I also have a Vivitar 1.5x-22 teleconverter with the mount anodised. I will scrape the paint off to match the required contact and then I should be able to use this at any f stop......I hope.

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