This image is a five section mosaic taken on five separate evenings using a 135mm lens. The lens was piggybacked on my ten inch reflector with Astronomik filters attached to the front of the lens. I was also using a Vixen Atlux mount and an Atik 33L mono CCD camera.
I captured 3 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.
Section 1, 114 minutes using a HA filter, 103 minutes using a S11 filter, 92 minutes using an O111 filter, 41 minutes using a blue filter, 11 minutes using a red filter and 12 minutes using a green filter.
Section 2 had exposure times of 40 minutes using a Ha, 30 minutes using an O111 filter, 30 minutes using a S11 filter and 10 minutes using a blue filter .
The total exposure times for section 3,4 and 5 was 90 minutes using a HA filter, 30 minutes using an O111 filter, 30 minutes using a S11 filter and 10 minutes using a blue filter.
Red
