North-America Nebula (Tom)

Acquisition Date	:	22-oct-2011
Camera	:	modified EOS20D
Camera Settings	:	With 12mm H-alpha filter 12x15min@ISO1600; without filter 60x3min@ISO800. Total of 6 hours exposure
Telescope	:	Pentax Takumar 135mm
Mount	:	Vixen GP
Adapter / Prime / Afocal / Other	:	prime
Processing Package / Processing Applied	:	Nebulosity. Dynamic background extraction in Pixinsight LE
Web Site	:	www.astro.zalmstra.nl
NOTES	:	My first HARGB

Position 2 overall, due to these votes:
Vote for this image	:	4 votes