Filters used:
L(Ha)/R/G/B 
Image: Abell21 - The Medusa Nebula
Scope - Mount:
Celestron
Edge HD11 scope - Celestron CGE mount
Constellation: Gemini
Camera:
QSI 583ws
Imaged at: Anza, CA
Total Exposure Time: 150
minutes total
Date imaged: Dec. 8, 2012
Approximate FOV: 31' x 24' (f/7)
Guided?: PHD w/SX
Lodestar
For
further information, see: http://en.wikipedia.org/wiki/Medusa_Nebula