Quote:
Originally Posted by RobC
John,
Great first light image with new scope and camera. Congratulations.
Went searching for the 9" CDK and could not find it. Can you please post a link to the scope.
Also curious about your gain settings for ZWO 1600. In particular your reason for the 75 gain setting.
Cheers
Rob
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Thanks Rob,
The scope in fact is a totally refurbished/rebuilt Orion ODK 10. The scope had both the main and secondaries re-ground, re-polished and re-aluminised achieving a Strehl Ratio of 0.935 by inferogram.
The scope has a number of other improvements like a felt lined tube, improved focuser and improved secondary.
All Orion ODK scopes have a 0.25" stop around the outer edge of the primary. So they are in fact a 9.5" f/7 optical system rather than what Orion UK advertise.
It's got great promise and it's very far from from the original!
Stefan who re-built the scope seems to have done an amazing job.
In terms of the camera settings, I just looked at other people's images and gave 75 a go as it appears to be used a lot by other. I am also keen to try 135.