A 16" f3.5 (with 3" coma corrector) spot diagram at 22.211mm off-axis, 44.4mm diameter, is shown inside a 20 micron box above and to the left of the large, teal "football."

A 16" f8.4 Ritchey-Chretien Cassegrain's spot diagram at the same position on the CCD chip, at the same scale, is shown inside the 100 micron square box.

To see both systems full spot diagram charts, click here.

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