yet trying long time exposure, now with Cat's Paw Nebula
In the enhancement I used 8 m 30 s of B/W with pseudo red filter from Canon to boost red channel in Photoshop.
(no real filters, no coma correction, no guinding)
GSO 305 mm - Canon Rebel XT - iso 1600 - 20 m 59 s 42 frames (30 s)
medium scale
http://i1063.photobucket.com/albums/...ngc6334_1k.jpg
large scale
http://i1063.photobucket.com/albums/...ngc6334_2k.jpg