NGC 7380: Wizard Nebula RGBHa (Chris Sullivan)

NGC 7380: Wizard Nebula RGBHa

EDIT: The problems I described below vanished when I pointed my filter wheel inward towards the back of the scope. It looks like gravity was just too much for the spacers I had on it and that my problems were not due to focuser sag or tube flex. I've since replaced the spacers between the coma corrector and the filter wheel, going from three to two and using thicker ones as well. I'm betting this will solve my problems.

Original post:

I've been having a lot of problems with collimation - I think my camera simply weighs too much for my focuser. Everything squares up perfectly with a laser and cheshire, but once my camera is on, everything is out of whack. Even collimating off a star is impossible. Star shapes particularly at the right side are terrible in this image. I'm not sure what the solution is other than to replace the focuser, which is out of budget at the moment.

I was planning on doing a SHO version of this - I shot my oxygen, but don't have sulfur yet. I'm debating leaving it alone for now. On the other hand, I still haven't really done a full SHO image aside from a draft of M1. I would like to complete at least one...

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Description: Tighter crop.

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Description: This is a tighter crop than I wanted, but I really didn't like the orientation of the original version. I really messed up on framing this one - it's a good reminder to always check what Stellarium and plate solving give you. Sometimes, it's way off-center, and starting off with faint blue, green or oxygen III is not necessarily going to show you what the framing looks like. Note to self: take a hydrogen alpha frame on hydrogen alpha-heavy targets, even on moonless nights.

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ZWO ASI1600MM/QHY163M
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Astrometry.net job	1647087
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NGC 7380: Wizard Nebula RGBHa

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