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NGC6188 in Ha at 3900mm.
This is a predictable subject to image but I wanted some strong Ha to test the new ATIK11002M. And also, I wanted to test my new OAG setup with my EdgeHD14".
I had been plagued by elongated stars when using a piggy-back guiding rig and run out of things to tighten or tweak. So I decided to try to guide at a FL of 3900 - not easy and finding a guide-star problematic but here is 90 mins worth of Ha and 50 mins of O3. That's all I could manage before my Dec motor started to stall. (It's always something.)
I have not stopped yet to ask how to process this data so I've just stacked them in DSS and pushed it around a bit in PS.
The real message in the images is about tackling the elongated stars AND showing that an EdgeHD14" can illuminate a sensor this size (43mm diagonal).
Peter
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