IMO, the short answer is, No. I understand the dilemma of needing to post your image somewhere, but forcing it into a forum where it doesn’t obviously fit, seems like a bad idea. There are plenty of astro forums on which to post your astro images; not sure why FM is the forum of choice. It’s a great image, especially considering it wasn’t done with “traditional” astro gear. Nevertheless, until FM creates an Astro Board, this seems out-of-place.
Same goes for posting on the Canon Board. Following that logic, every image posted on a Presentation Board should, then, be posted on the associated Gear-talk Board. I disagree with the practice of multi-posting one’s images; but that’s probably just me.
Jack