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Old 18-07-2020, 08:45 AM
stephen2615 (Stephen)
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stephen2615 is offline
 
Join Date: Feb 2011
Location: Canberra, Australia
Posts: 70
Cannot focus QHY 16200A CFW7

Greetings,

I have two QHY cameras. A QHY 163C which behaves perfectly with my setup. My Sesto Senso autofocuser sits on about 50,000 out of a range of 1 to about 92,000 with the 163C.

I recently purchased the 16200A and waited months to get the filters and last night I tried to use it. It will not focus. Winding the autofocuser to 100 (is that all the way out?) still shows a large round blob that is Acrux. It looks like it has to go into negative territory and I would guess about -40,000 might get there.

Is the solution putting a spacer in between the telescope (which has the focusing device) and the flattener/reducer that I have. Given my back focus requirements, I can't do anything in between the camera and the reducer.

Why would the 16200A be so different to the 163C when it comes to focusing?

Any assistance would be extremely welcome.

Regards

Stephen
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