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Old 2nd August 2010, 06:44 PM
Artfull-Bodger Artfull-Bodger is offline
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Join Date: Feb 2010
Location: Llantrisant
Posts: 308

Good post Rob, the only time I have seen a difference is when I did my scope set up on white card targets, then it ranged short on everything else, since then I mark up my sidewheel on wood using the neutral coloured grain/bark detail to focus on!

Your reply has pretty much fleshed out where I was going, I was wondering if the brighter target causing the pupil to close produced enough of a focal shift compared to when the pupil is wider looking at a darker image?
I was thinking along the lines of a cameras arperture there!

many thanks for that Rob, something to think about.

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