Moon photographed in Moose Factory, Ontario Canada

yu244720 has added a photo to the pool:

This is a moon shot taken with a Nikon D3100 in prime focus with a schmidt cassegrain telescope. Due to the focal length of the scope, a focal reducer was used.

To "sharpen" the raws, the moon was photographed in monochrome, using a wratten number 25 deep red filter. The use of a deep red filter when photographing the moon helps overcome the distortions (spatial and chromatic dispersion distortions) caused by the atmosphere which behaves like a prism. Red light bends the least in the atmosphere and less prone to distortion effects than in the blue/violet end of the visible spectrum.

Atmospheric chromatic dispersion issues are always a problem with photographing objects lower in the horizon (especially mercury, and venus). The lower the object is in the sky, the more atmosphere you must cut through to image properly. It is therefore best to photograph the moon at zenith (if you are at the equator) or at the meridian - you cut through the least amount of atmosphere by doing so.

19 Images where then photographed, then stacked with registax 6.0.

Some final tweeking was done with GIMP to prevent overexposure of the image (normalization) and further bring out detail (using unsharp masking technique) while trying to avoid artifacts from appearing in the final image.