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Ray--What focal ratio is that. Native or with the reducer?
Native focal length no reducer or flattener 2514 mm F11.5
As the 'scope is an uncorrected Dall Kirkham cassergrain one expects coma off axis, just need to accumulate enough pennies to talk to Claude.
I have tried various exposure times and camera gain settings but this combination gives the best star colours. The core is not blown in the unprocessed stack but stretching to reveal other detail does saturate the core. For capture control and processing Nebulosity 3 was used. Seems like I have some way to go with processing.
I missed taking a screen dump of the best guiding rms .24 arc seconds; nice when it is dark, clear and the atmosphere co-operates.
Chris
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