There is not much light to go around at this image scale (1.3 "/p) with an Ha filter in front of the camera, so long exposures are the order of the day. Ideally I'd be doing 20 or 30 minute subs, but that puts a lot of stress on both observer and guiding, so I stuck to 10 minute subs and stacked a fair few. 17x600s total integration time nearly 3 hours.
A am pretty pleased at how this turned out, as it as a bit dimmer than I was expecting!
cCaptured in ArtemisCapture, calibrated in ImagetoolsCa, DDP in maxim, thuggery in photoshop.
This image was autoguided using my homemade off axis guider with Lodestar.
Exposure Details :
Coma Corrector Astrodon 6nm Ha 17x600s on 200 @ F5 f.l. 1000 with Artemis 285 camera
Curdridge Observatory, Southampton,UK