M13 - The Great Cluster in Hecules is one of the finest globular clusters in the northern skies. At this time of year, it does not get properly dark - and the darkest parts of the night are past midnight, so its best to aim for the brighter DSOs. Before testing Artemis on this target, I paid extra attention to my collimation as I find globular clusters very senstive to such things.
Frames captured in ArtemisCapture and saved as FITS. Stacked in registax 3 and saved as FITS. Iris used to co-register all frames and scale the colour exposures and create a tricolour PSD. Photoshop CS2 used to combine luminance FITS and colour image with multiple LRGB layering. Shorter L exposures used to reduce star bloat.
Exposure Details :
14x60s on 200mm @ F5 with ART429
14x10s on 200mm @ F5 with ART429
3x180s on 200mm @ F5 with ART429
Blue 4x40s on 200mm @ F5 with ART429
Green 4x40s on 200mm @ F5 with ART429
Red 4x40s on 200mm @ F5 with ART429
Curdridge Observatory, Southampton,UK