Whirlpool Galaxy, M51
Imaging information
Optics: Takahashi BRC250, PentaxMS5 mount
Camera: SBIG ST-2000XM, Astronomik Type2C LRGB filter
Exposure: L=10minx10, RGB=10minx2
Software: Stellaimage5, PhotoshopCS
Location: Ichikawa town, Hyogo Prefecture, 2006
published in Gekkan-Tenmon magazine