Quote:
Originally Posted by avandonk
Marc focus is as good as I can get it. I am using the achro with a FR/FF at f/4.25 to get a wider field. I don't think that a 150mm diameter F5 APO could be built. If it could I would guess it would cost a heap. Aberrations are far harder to eliminate at high convergence angles.
Below is the full FOV of the achro.
Bert
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Makes sense now. The image scale is way different.
Very cool widefield btw. Lovely colors.
