Singlin

I also have the 10" Quattro. The stock focuser is not up to the task of Astrophotography by a long shott. I also updated it immediatly to a moonlight and stepper motor. I would advise you to get the carbon fibre version as the steel version is not great when loaded fully for Astrophotography. I had a carbon tube made for mine.

Thanks Jaspa!

After taking some images of a Comet last night I decided to slew to M101 and let the scope pay for its keep for the rest of the evening. 10 x 600s in ,R,G and B 18 x 600s in L Scope: Sywatcher Quattro 10" Mount: Mesu 200 Camera: Atik 383L Filters: Baader I will try and acquire some more data this evening.

Great explanation and demonstration

Asi 120mm hooked up to my homemade 16 inch dob. This is not in perfect focus but I was playing around with my Dob that I only use for visual. I am quite pleased with this brief attempt.

I use Pixinsight to add Ha to the red channel of my rgb image.

Location: Italian Alps 10x 300 sec subs in Ha,L,R,G,B Telescope: 10" F3.9 Newtonian Camera: Atik 383L Mount: Mesu 200 Filters: Baader Ha,L,R,G,B. I used "Pixmath" in Pixinsight to add Ha to the red channel

Thanks for the input. I will double clean and check today. I would have thought that my flats would have removed them though.

Sorry, I have ammended the flat file.

Attached is my stretched Master Light frame where you can see a doughnut in the bottom right corner and one in the top left corner. light_FILTER_L_BINNING_1_integration_ABE.tif

After doing a screen stretch and automatic background extraction on my Master luminance I am getting dougnuts in the image. Is this caused by faulty flats? Attached is one of my Luminance flats L_1309L.fit

I agree their are alot of gradients and possibly cloud too.Here is my effort with it.

SII data.

I spend more time observing with clients of the Hotel than Imaging. This is a rushed attempt in capturing and processing in order to maintain my general skills in both of the aforementioned. Clear skies with strong Jet Stream. 15x 600s subs in Ha;OIII and SII. Skywatcher 10" Quattro Mesu 200 and Atik 383L Baader Narowband Filters