Oops I looked it up.KAF16803 is 36.8mm x 36.8mm with a 52.1mm diagonal. No I don't get coma in the corners with my scopes as they all have flatteners or have a design that flattens the image. But any scope is going to need a flattener of some type in the imaging train with a diagonal that large.
KAF8300 chip is 17.96 x 13.52mm for a 22.5mm diagonal. Many scopes do not need a flattener below 20mm diagonal. So its on the edge of needing one but you may not with your particular scope.
Greg.
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