Eta Carinae (NGC3372)
Taken with a one shot colour camera from Bortle 7 skies in Sydney Australia.
The image consists of 90 x 4 minute exposures that were stacked on the fly using SharpCap software, 90mm lens, ASI294MC camera, Optolong LP-Pro filter and Losmandy G11 GT mount.
So whilst the camera was left open for 6 hours, the stack is effectively only 4 minutes but with so many sub exposures it is virtually noise free. The mount was unguided during that time and any small deviations from each 4 minute sub exposure were managed by a slight repositioning of stars in the SharpCap software.
Eta Carinae (NGC3372)
Taken with a one shot colour camera from Bortle 7 skies in Sydney Australia.
The image consists of 90 x 4 minute exposures that were stacked on the fly using SharpCap software, 90mm lens, ASI294MC camera, Optolong LP-Pro filter and Losmandy G11 GT mount.
So whilst the camera was left open for 6 hours, the stack is effectively only 4 minutes but with so many sub exposures it is virtually noise free. The mount was unguided during that time and any small deviations from each 4 minute sub exposure were managed by a slight repositioning of stars in the SharpCap software.