Made with a Newton 250 f/4, a CCD camera Atik One, AZEQ6 mount.

Luminance : 30 hours, 300s subs
RGB : 9 hours, 300s subs
Ha : 4 hours, 300s subs
Short exposures to gain resolution on the galaxy : 6 hours, 1’’ subs, Altair GPCAM USB3.

Copyright: Olivier Aguerre

Image Description and Details :

M101 taken with a Newton 250 f/4, AZEQ6 and a ATIK ONE monochrome camera.
53 exposure hours in LRGB-Ha (38 L, 11 RGB, 4 Ha), under various Moon conditions and always polluted sky (SQM 19,7 without Moon)
But the seeing was good, allowing great resolution.
Hundreds of very far and faint galaxies can be seen in the background.
Done at 35 km North of Paris and 15 North of Roissy.


Copyright: Olivier Aguerre