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01-10-2009, 11:36 PM   #1
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SMC P-A 35-105/3.5 Focusing Past Infinity

Hey guys,

Recently got an SMC Pentax-A 35-105/3.5 since it is one of the highly regarded manual focus zooms that Pentax has made. It is in great condition, basically like new. however, it has the ability to focus significantly past infinity, such that if I move the focus ring to match up with the infinity symbol, then distant objects are out of focus, even at the wide 35mm side of things. I have to set the focus closer by several degrees of focus ring rotation before they snap into focus.

I was wondering if anyone has ever experience that with their copy, or if anyone knew how to adjust the infinity focus with this lens? I love the lens other than that, but it makes it somewhat of a pain for landscapes since I have to make sure I am not focused too far. Thoughts, comments?


01-11-2009, 02:48 AM   #2
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That's a sure sign that the lens was opened up at some point of time and was not collimated for proper infinity focus when the lens elements were put back together. My suggestion is to have it sent to a proper repair shop with a collimator to have it properly adjusted.

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