Untitled Document

M97
The Owl Nebula

Click Image for Larger Version

TEC140 @ f/5.4 
Riccardi .75x Reducer SBIG STF-8300M 
Atik EFW2/OAG 
Astrodon Ha,OIII,SII filters Losmandy G11-Gemini 2

SII=12x20min Ha=15x20min OIII=17x20min + 5x45min Total = 18hrs 25min 

This started as a bicolor Ha/OIII image. I noticed that the 20min OIII exposures just started to reveal the not often imaged outer halo. So I added 45min OIII exposures (my longest yet) to bring out the halo. I also added SII data to make a more complete tri-color image.