This image was taken under clear, moonless sky conditions with only light pollution to contend with. Stars were visible down to magnitude 5.
I was using my 10" f/4.8 reflector, a Vixen Atlux mount, PHD auto-guiding and an Atik 383 L mono CCD camera.
Five minute sub-frames were captured with matching dark-frames. Flat-fields were used to reduce the effect of vignetting in the final image.
For luminance data the camera was set to x1 bin mode and for the colour data the camera was set to x2 bin mode.
The luminance data had a total exposure time of 45 minutes using an IDAS filter. The exposure times for H-alpha, OIII and blue were 10 minutes for each filter.
M105, NGC 3388 and NGC 3389
