The Ring Nebula (M57)

Posted by tomdiana
on Monday, September 10, 2018

Telescope: TS-Optics 10" f/5 carbon fiber Newtonian
Mount: iOptron CEM60
Guiding: QHY5L-II on 300mm Tele-Takumar lens
Camera: modified Canon 650D; ISO 800
Exposures: 24 five-minute subframes + 26 1-2 minute subframes (for avoid over-exposing the core). The long- and short-term composites were aligned in Registar and combined in Photoshop using a layer mask.

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