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Many thanks Fahim, you’re first on the guest list for my new observatory!
I’ll have to look more into what needs to be planned to avoid FR - I don’t know anything about this.
I looked at your links, and realise it’s all possible. It seems like people get great images with fast scopes and modern CCD’s with short imaging times. I’ve looked at most of this before, but had sort of assumed they used very long exposures. (Haven’t I seen this recently though … many minutes or hours through filters?)
From the Obsession site:
“Imaging with a large aperture reflector like the Obsession is exciting. The large light gathering area means CCD exposure times are very short - usually under a minute. Minimal guiding or none at all. Multiple images are stacked in your PC to build up a vivid image. With proper software, field rotation at the focuser is eliminated.”
Surely an Obsession f/5 is no different in this respect from any other f/5 system? I thought stacking was more the domain of planetary imaging, not DSO’s. Also, what is this field rotation software? Presumably it’s part of the astro stacking programs. Rhetorical questions really, I can look into this myself at some stage. Sigh! So much to learn!
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