Thanks for the comments and sorry for the late reply...I've been on a photon gathering field trip.
John,
The focal length used was about 11m.
Quote:
Originally Posted by gregbradley
Superb!
What sort of DK scope is this?
I wonder if my CDK17 could do images like that?
Greg.
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It is one that I made myself. All epoxy/carbon structure on Alt-Az fork mount with Bartels drive. Field rotator and peltier cooling built in as part of the design.
You should have a go with the CDK, but I doubt that it is really diffraction limited on axis because it may not have to be (for deep sky work).