Recently was testing our new 305MMF3.8 Honders Astrograph under hazy Illinois skies. Tried RGB but with our heavy light pollution I was not able to get a very good result. Narrow band cuts thru most of that so here is the result.
2nd night of testing on M27. The air was still somewhat moist and hazy, but the seeing was much better. Switched from RGB to H-a, OIII and B.
Details:
Equipment - 305 Honders F3.8 astrograph, STL11K camera, 7nm Baader H-a, 7nm OIII Baader, Blue Baader filters, 3600 mount.
Exposure times - R = 1.5 hours H-a, G = 1.3 hours OIII, B = 10 minutes Blue.
Cropped image at full resolution
Rolando
2nd night of testing on M27. The air was still somewhat moist and hazy, but the seeing was much better. Switched from RGB to H-a, OIII and B.
Details:
Equipment - 305 Honders F3.8 astrograph, STL11K camera, 7nm Baader H-a, 7nm OIII Baader, Blue Baader filters, 3600 mount.
Exposure times - R = 1.5 hours H-a, G = 1.3 hours OIII, B = 10 minutes Blue.
Cropped image at full resolution
Rolando
Attached Image:
