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4" focusers, enormous imaging circles
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13-10-2020, 03:23 PM
gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 17,902
I had a Tak FS152 with a 2.7 inch focuser. I found it could not handle a fullframe camera. I upgraded to a 4 inch focuser and no troubles.
My experience is 3 inch minimum or 3 inch + are needed for full frame.
Greg.
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