NGC2264, The Christmas Tree Cluster.
This image was taken under moonless clear sky conditions with stars visible down to about magnitude 4.7. I was using a 135mm lens piggybacked on a ten inch reflector mounted on a Vixen Atlux mount with PHD auto guiding. I also used an Atik 383L mono CCD camera with Astronomik filters attached to the camera lens. I captured five minute subframes with matching dark frames and combined them with flat field frames to reduce the effect of vignetting in the final image. The total exposure time was 90 minutes using a H Alpha filter, ten minutes using an O111 filter and twenty minutes using a blue filter.
Two images stitched together using Paint Shop Pro software.