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All taken at Prime focus, unfortunately the birds were a little shy today most shots are at long distance. I took a shot of the tree were most of my shots from the other day had originated. Just to compare the sharpness of the prime focus vs the EP which is considerable in most of the FOV. I still found that most shots suffered from chromatic aberration, with violet colored borders around objects. I am considering trying the Baader semi APO filter to correct this problem.
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