I love using ISO 6400!
This is only 50 minutes of data, the dust/nebulosity has come up easily.
good fun!
8” F/4 astrograph , baader type 3 coma corrector,. HEQ Pro 5 mount, orion mini guider.
Camera.
Unmodded Cannon 1100D plus cooler box. 25 subs x 2 minutes at ISO 6400. Stacked in Deep Sky Stacker .Processed in Photoshop Cs2..
Iv'e added a repro with a not so prominent Antares.
Cheers,
Justin.