Decided to try 240s exposures in each of RGB this time instead of my usual 180s (chosen to balance detail and LP) and it seems to have worked well, especially since there only 5 subs of each colour. Much deeper into the fainter stars too.
Supernova Remnant, Crab Nebula, Taurus Mag 8.3 Size 6’x4′ 2012-02-18 200mm f5 Newtonian MPCC Guided Canon EOS 350D modded, Astronomik CLS 20x180s darks, flats, ISO 800 Captured in APT, Processed in Nebulosity, PS CS5 This is number 36 out of 110 Messier objects now imaged.
Globular Cluster, Hercules Mag 5.8 Size 16.6′ 2011-04-29 200mm f5 Newtonian MPCC Guided Canon EOS 350D, Astronomik CLS 15x120s 10x180s darks ISO 800 Processed in Nebulosity and PS CS5 An updated version with the 200mm.
Open Cluster, Cygnus Mag 7.1 Size 7.0′ 2009-07-30 C80ED, Canon EOS 350D, Deep Sky Filter, Guided 10x60s 3x90s ISO 800 Processed in Nebulosity and PhotoShop CS3 Still not got rid of the bluish hue from the filter.