M71 Globular cluster in Sagita.

M71. This globular cluster lies deep with in the constellation of Sagitta at a distance of about 13,000 light years . It shines at about magnitude six and is easily visable through a small telescope. I took this image using my ten inch F4.8 reflector , PHD auto guiding and an Atik 383L mono CCD camera . I captured five minute sub frames with matching dark frames. I also captured twenty flat field frames for each colour channel to reduce the effect of vignetting in the final image. The total exposure times was 40 minutes for each colour filter:

M11 The Wild Duck Cluster

This open star cluster lies in the constellation of Scutum at a distance of about 6,000 light years.I was using my ten inch F4.8 reflector, an Atik 383L mono CCD camera with PHD auto-guiding. 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 composition. The total exposure times was 35 minutes in red, 20 minutes in green and 30 minutes using a blue filter:

NGC7331 in Pegasus

This spiral galaxy lies at a distance of about 40 million light years. Notice the number of surrounding galaxies including Stehans Quintet to the upper left. I took this image under very clear sky conditions with a first quarter moon  to contend with. I was using my ten inch F4.8 reflector, an Atik 383L mono CCD camera with PHD auto guiding. I captured five minute sub frames and dark frames with flat field frames to reduce vignetting in the final compsition. The total exposure times were 50 minutes in blue, 30 minutes in green and 20 minutes using a red filter.