M-101 "The Pinwheel Galaxy" (27 million ly)
Click on the image for the Full Resolution

Material :
 

    - Losmandy HGM TITAN / Gemini Goto mount
    - Meade 12" UHTC SCT OTA at f/10 (3048mm)

    - SBIG ST-10XME at -27.4°C
    - SBIG CFW-8A
    - SBIG AO-7 Adaptive Optics used at 0.3Hz
 

Conditions :

    - clear sky
    - wind : NO
    - seeing & transparency : 3.5/5  (bad seeing the 3rd night)

Exposures : on 3 nights (545min. of total exposure)

L (Non IR clear filter) = 109 exp. x 5 min. (binning 2x2)

R = G = 5 exp. x 5 min. (binning 3x3)

B = 8 exp. x 5 min. (binning 3x3)