Ooohps, I forgot the whole purpose of my reply. I know they're off a vendor's website, but here are some claimed photo's taken with a Promak 180.
http://images.google.com.au/imgres?i...KULZe-M4j87J4B
As far as I understand Maks are synonymous with very long focal lengths and consequently slow f-ratios. I don't expect you'll see many examples of astroshots through Maks just because those interested in photography prefer SCT's.
Mike.