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Old 09-06-2015, 08:42 AM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 17,903
That's impressive Glen. I would not have though you would get round stars to the corners with a 19% obstructed scope.

As Roland pointed out in the original post I posted you need the large 40-50% central obstruction to cover a large sensor.

Its amazing how light will bend around the obstruction.

Greg.
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