david_myers2 Posted September 3, 2008 Share Posted September 3, 2008 I just acquired a D300 and while it seems to work fine with a number of lenses, I cannot get it to focus at infinity with my 20/2.8 AF lens. I can get it to work within about 10 feet, but beyond it will not auto focus. Any ideas on what might be wrong? I should also note, that when I focus manually, I can get the dot to appear, indicating it is in focus. Thanks in advance, David Link to comment Share on other sites More sharing options...
tri-x1 Posted September 3, 2008 Share Posted September 3, 2008 I used a 20mm f2.8 on my D300 without problems. I assume your lens focuses to infinity on other AF Nikons. If you haven't tried that it would be a good first step Link to comment Share on other sites More sharing options...
david_myers2 Posted September 3, 2008 Author Share Posted September 3, 2008 Good point. I checked it on the D80 and it was fine. Link to comment Share on other sites More sharing options...
michael_darnton1 Posted September 3, 2008 Share Posted September 3, 2008 Perhaps it is front-focusing at all distances, but because of depth of field you aren't noticing--you only notice when the infinity number doesn't line up? I'd check the exact focus at closer ranges to see if it's focusing correctly--you may have to do some fine tuning. Link to comment Share on other sites More sharing options...
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