M13

This image was captured under a Full moon with very clear sky conditions.

I was using a Vixen Atlux mount, an 80mm refractor at f/6.3, PHD autoguiding 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.

The total exposure times were 60 minutes for each filter, Ha, OIII and Blue.

M13

Closer view