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There is a lot to like about what you have done there Rolf (much of it already stated by others)
However, in the spirit of constructive criticism and in an attempt to apply the scientific method even at the philosophical level, there is not much to be learned through validation. So, I'll keep my comments to what I believe to be the area's which might be improved.
It is my opinion (and take that as you wish) that the limit of your rig is a product of the light (from the foreground stars) being scattered across the fov from the various optical surfaces in the OTA, including internal reflections. There are a number of ways to reduce this issue.
* Image areas of the sky which are far away from the galactic plane.
* Switch optical trains to minimise scattered light. (I suspect the good old RC design without a field flattener might enable you to go deeper still)
best
c
Last edited by clive milne; 05-08-2015 at 03:05 PM.
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