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Custom
4" Coma Correctors for the Dream Astrograph line and other
select customers. |
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The chart to the left shows the vignetting of the
4" coma corrector out to the corners of the 1.5" square
CCD chip when used on the 24"
f3.5 Dream Astrograph. Approximately 82% at the extreme
corners of the CCD chip. |
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The 3" coma corrector is 34% illumination at
the same location on the CCD chip, the corners of this large
chip. |
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The chart to the left shows the vignetting of the
4" coma corrector out to the corners of the 1.5" square
CCD chip when used on the 16"
f3.75 Dream Astrograph. Approximately 87% at the extreme
corners of the CCD chip. |
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Click on the small image below to see the matrix spot
diagram, which shows chromatic performance of this corrector. |
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