Wow, another clear(ish) night forecast. Â I took the opportunity this evening to give the scope collimation a tweak, but I found that the seeing wasn’t great at all, with some high level moisture causing a few problems.
I used the nearby Red GiantÂ Î± Tauri (Alderbaran) to carry out thefinal collimation tweak. Â I used, for the first time, the defocused star real-time collimation routine in CCD Inspector to aid with the routine, though a little cumbersome with the DMK camera, I reached a point of “perfect” collimation after about 30 mins of effort.
buoyed with this success, I used the Bahtinov Grabber routine developed by Niels Noordhoek (Can be found here) to assist in precise focusing. Â Once again, I found this a little more difficult using the DMK probably down the sensitivity, but the software reported the Bahtinov shape in the critical focus zone.
Imaged using an IS DMK camera through a Meade 12″ LX200R at native f10. Â Stacked using AVIStack2, the image is 350 from 2000 frams taken at 30fps. Â A little blurry still, but I think this was down to atmospherics rather than collimation this time.
Thanks for looking