Matt, I hear you on that.. I tried imaging @ F/10 through my 11" and the results were shockingly bad (unguided + 2800mm focal length) now that I've NEARLY got guiding working properly I'll be giving it another go to split the trap... I dont see any real reason to image at F10 other than splitting the trap...
For me, even F/6.3 isnt easy @ 1764mm
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