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03-18-2009, 11:31 AM   #16
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Join Date: Feb 2009
Location: Hilo, Hawaii
Posts: 42
>>Were you able to get A aperture bigger than f/4.0 such as f/3.8, f/3.5, f/2.8 etc. I still have that problem that my pk-a only goes to f/4.0 as maximum aperture in Av mode. I have purchased a new adapter from Frank and it should come anytime. And I still want to see if any further scraping on the screw head(s) will fix the problem for me.<<

Yes, the second PK-A adapter I have will show the aperture open up to f3.5. The first one will not show anything except that the EXIF still shows what aperture I was using. I scraped and sanded those electrical contacts and no different. I believe it has to do with the actual computer chip inside.

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70-300mm, adaptall, k-mount, ld, pentax lens, slr lens, tamron, tamron sp adaptall
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