Acquired with SBIG ST-10XE CCD Camera,AP 130 F/6,EM200 Guided by STV
Twelve 10-minute exposures through a 4.5nm CA Hydrogen Alpha Filter.
No flats used. The nebula was very low in the southeastern sky, buried in the middle of the Oakland light dome, so I was happy to get anything useable from my light polluted SF Bay Area location. If the Eagle had been any lower in the sky, the fence surrounding my yard would have shown up in this image. Focus wasn't terribly sharp, due in part to my using excessively short focus exposures in Maxim. I'm sure M16's location low in the sky didn't help.
Image is at http://www.pbase.com/steelnavy/image/81085300
Comments and criticism welcome. There's no easy way to learn narrow band imaging except by doing it and understanding where I've made mistakes.
Rob Mackie
Twelve 10-minute exposures through a 4.5nm CA Hydrogen Alpha Filter.
No flats used. The nebula was very low in the southeastern sky, buried in the middle of the Oakland light dome, so I was happy to get anything useable from my light polluted SF Bay Area location. If the Eagle had been any lower in the sky, the fence surrounding my yard would have shown up in this image. Focus wasn't terribly sharp, due in part to my using excessively short focus exposures in Maxim. I'm sure M16's location low in the sky didn't help.
Image is at http://www.pbase.com/steelnavy/image/81085300
Comments and criticism welcome. There's no easy way to learn narrow band imaging except by doing it and understanding where I've made mistakes.
Rob Mackie
