Originally Posted by stevebrot
Well, that looks pretty good, I said to myself, so I took a few shots wide open at distance, but the results were really lousy. 
The photos of neighbor's house were even softer than my Jupiter-9 at f/2. 
I don't know if there is a problem with infinity focus or if there is some other issue. I will take some more pictures tomorrow and try to better characterize the problem. Any suggestions would be appreciated.
Steve
Do you have the Pentax brand M42 adapter? If not, that could be your problem. The adapter should sit absolutely flush with the face of the bayonet mount so that the lens is touching the mount - otherwise you cannot focus to infinity.
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Albert in the Rockies http://www.flickr.com/photos/albert_berry/
SF-1, MZ-S, K10D + D-BG2 grip
M 100/4 Macro, M 400/5.6, A 70-210/4, FA 28-80, FA 24-90, DA 12-24/4, DA* 16-50/2.8, DA* 50-135/2.8, A 1.4X-S TC, AF 1.7X TC
Manfrotto 055B tripod + 0168 ball head, Benbo Trekker tripod, Velbon UP-43 Monopod
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