This image was something of an experiment. Some time ago I purchased a focal extender called a Powermate, which as the name suggests extends the focal length of the optical system to which it is attached. The precise degree of extension depends on exactly how it is connected in to the system, but for the most part it provides around 2.5 times the focal length of the main telescope.

When used with my Edge HD8 scope, the total focal length of the system is somewhere around 5.25 metres which results in an extremely close up view of the lunar surface. To try to give this some context the main crater, Posidonius to the left of centre, is approximately 58 miles in diameter. Given that the distance to the moon is around 240000 miles, it's clear that the area captured in this image is extremely narrow in angular size.

In processing this image I found a new piece of software called Astrosurface, which was exceptionally good at stacking and sharpening the individual frames which were captured as a video stream over several minutes. Definitely a step forward from the older and now no longer developed software which had been the default option for most lunar and planetary imagers for several years.