Andromeda nebula

Object info:
Common name: Andromeda nebula
Catalog code: M31
Object type: Galaxy
Constellation: Andromeda
Imaging info:
imaging date: 3 October 2011
Optics: Astrotech 80 ED
Effective focal length: 550mm
Camera & filters: Modified Canon EOS 20D
Exposure & camera settings: 20x5min ISO 800
Imaging software: DSLRFocus 3.1
Mount: Vixen GP
Guiding details: autoguiding with PHD 12.1 and Meade ETX with focal reducer and DSI I camera
Additional info: Humid atmosphere
Image processing:
processing date: 5 October 2011
calibration frames: 20x5min darks; no flats
stacking & calibration software: Nebulosity 2.4.1
Local conditions:
Location: Stroe
Temperature: 15
Additional info: Humid atmosphere