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Old 29-07-2020, 01:09 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 18,183
I use this free calculator.
Its a great tool for comparing various camera and telescope combinations and you see the field of view and the sampling in arc secs/pixel.

You want to be in the range of 1 to 2 arc seconds per pixel for average seeing. Closer to 1.

Under 1 in good seeing.

My CDK17 is running at .42 arc seconds/pixel for one camera with 6 micron pixels and that works great when the seeing is very good. Otherwise it works
better with a camera that has 9 micron pixels.

The KAF8300 pixels are 5.4 microns so smaller again than the 6micron camera.

On a 12 inch RC that is going to need some decent skies to work well.

I have imaged with the KAF8300 on the CDK17 and then straight away with a 9 micron camera. It was average seeing, perhaps it was slightly poor seeing.
The 8300 was surprisingly worse in sharpness, very noticeable and not subtle.

I notice it now with a 2.4 micron camera at 1160mm focal length. Hard to focus and badly affected by poor seeing.

Greg.
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