Well, it seems I am better with colors. Unhappily my Canon Rebel XT is a popcorn machine with iso 1600. But NGC 5128 is so little bright ... It is hard to vanish with all noise.
GSO 305 mm - barlow ED 2" 1.5x - Canon Rebel XT - iso 1600 16 m 35 s - 44 frames.
The third photo is a "less noise, less details" digital process.