I took this image under very clear sky conditions with only light pollution to contend with.
This image was taken with my 10 inch f/4.8 reflector, a Vixen Atlux mount, PHD auto-guiding and an Atik 383L mono CCD camera.
I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. I used an IDAS filter with a very short exposure time of 35 minutes for luminance. Colour data were obtained by setting the camera to x2 binning mode.
The total exposure times were 15 minutes using a H-alpha filter, 10 minutes using an OIII filter and 10 minutes using a blue filter.
M94
