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Old 17-04-2013, 10:27 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 18,185
Wonderful first light for such a large scope. It shows tremendous detail including stars and nebula in one of the sweeping arms I haven't seen before. Decon as mentioned is bit too harsh and a bit too much background noise easily fixed but really minor pickings.

Planewave did bring out a set of baffles you can install on the corrector. I installed them on mine. Reflections arcs, streams of light from bright out of frame stars are definitely the weaknesses of the CDK scope. Mine has improved somewhat but I did get an annoying arc in some otherwise lovely galaxy subs recently.

I also got a revised secondary shroud some time ago which also helped with these.

I have also read that the carbon fibre struts can reflect and reports covering them with flock can help (at the expense of the occasional dropped fibre on the mirror.

I suspect the scope's performance could be improved by flocking the inside of the tubes, the struts,installing the baffles if its an earlier model and making sure you have the latest secondary shroud.

Otherwise its a great scope and in mine the reflection issues only happen occassionally. Whereas with my AP140 refractor it never does. One of the joys of refractor imaging is it can be a whole lot simpler.

Greg.
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