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Forum: Canon Lenses Oct 6, 2003, 7:46 AM
Replies: 9
Views: 1,441
Posted By NHL
Russell I did this DOF test...

Russell

I did this DOF test (http://www.pbase.com/nhl/back_focus_tests) a while back. If you stopped the lens down to the f/4.5 working aperture of the other lens the 'perceived' sharpness also...
Forum: Canon Lenses Oct 5, 2003, 9:55 PM
Replies: 9
Views: 1,441
Posted By NHL
You should... You've just increased the DOF of...

You should... You've just increased the DOF of the Sigma to match that of the Canon (especially on a curvature) you know what they say about comparing apples vs oranges! :lol:
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