For general information on M81, see: http://apod.nasa.gov/apod/ap130925.html 
Image: M81 and M82 - A Galaxy Pair
Scope and Mount: HD11
@ f/2 & CGE
mount
Constellation: Ursa
Major
Camera: QSI 583ws
Imaged
at: Anza, CA
Total Exposure
Time: 200
minutes total
Date imaged: Feb. 6, 2016
Approximate FOV: 70' x 49'
(cropped)
Guided?: Yes
Filters used:
L/R/G/B/Ha