Looking to upgrade to mono deep space astrophotography. Can you recommend a good cheap camera I don't want to spend a fortune to get started and learn. Thought welcome
Cheap & mono don't really go together, especially when adding on the extras you need - even "cheap" filters & a wheel will cost over $500 new.
For "cheap", the ASI183MM (or similar in other brands) is a tried & trusted performer, though starting to fall a little behind the specs of newer cameras. Watch the classifieds here & you may run across a good deal on a 183MM or 1600MM with filters/wheel
The ASI533MM is both good, and cheap, cheap being relative to most other monochrome cameras but still, not "cheap" in absolute terms. Personally I would choose it over the 183MM, despite being a little more expensive.
I'm currently testing the new and quite affordable QHY533m (for h-alpha solar imaging).
First impressions are very positive. Good QE with no amp glow. That said, you might want to move past the "cheap" price tag, as a less affordable but far more capable option won't have you regretting your decision in a remarkably short time of frustrating use with a "cheapie". (183 based sensors have significant amp glow)