NGC7023 10262011 · The Iris Nebula, also NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. The nebula is lit by a magnitude +7 star, SAO 19158. This nebula is 1,300 light-years from Earth and has an apparent magnitude of about 6.8. 29x300sec fits exposures. Captured and combined in Nebulosity v2.4.0 software. Finishing touches done in PhotoShop.
Telescope: Orion 8" 1000mm f4.9 Newtonian reflector.
Mount: Orion Atlas EQ-G
Guide Scope: Meade 800mm f10 reduced to f5 with Atik x.5 focal length reducer (ADM rings).
Imaging Camera: Mead DSI Color 16bit camera with Peltier cooler modification.
Guide Camera: Meade DSI Pro monochrome 16bit camera.
Imaging camera in prime focus.
Filtration used: Baader UV/IR Cut filter ·