Heres a composite of 8x7 minute exposures with my canon 350d (hutech modified) of the pelican and gulf of mexico nebula regions in cygnus. I used a lumicon HA filter and copied and pasted the red channel into the G and B channels giving me greyscale. Seenig was pretty bad that night so I got quite a few corrections with the trusty st-4 resulting in some oblong stars.