The effects of seeing

Contains: Other

Description

Seeing effects on images can be dramatic and frustrating. Even when the clouds clear, it doesn't mean it's a good night for imaging!!

M81 single 30" 'L' frames. No processing in PI, just a simple 'Masked Stretch'

Left: 2/2/2017 with HFR value of 2.13.
Right: 2/18/2017 with HFR value of 4.07.

Same camera, same scope with perfect focus for each night taken within ~5 minutes of each other.

Not only is there a noticeable difference in the star shapes and sizes, but there's much more detail revealed in M81 on the left as well.

Comments

Author

Ron Bokleman
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Revisions

B

Added SGP autofocus

Histogram

The effects of seeing, Ron Bokleman

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Cloudy Nights