inch f/4.8 reflector. The total exposure times were twenty minutes for each colour filter
and thirty minutes using a H-alpha filter. One minute sub-frames were captured with
matching dark frames:
This image is a small section of NGC7000, A section of the south westen limb commonly named the wall of the North America Nebula in Cygnus the Swan. This unguided image was made by capturing sixty second sub-frames and matching dark frames. The total exposure times were 15 minutes for each colour filter and 40 minutes using an H-alpha filter:
