M3 .
Taken using an F/4.8 ten inch reflector, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik RGB filters.
I captured 60 second sub frames with matching dark frames combined with flat field frames to reduce noise and vignetting for the final result.
The total exposure time was 12 minutes for each filter.
M99.
Taken using a ten inch F/4.8 reflector , a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik RGB filters.
I captured five minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image.
The total exposure time was 30 minutes for each filter.
