Newtonians are the best telescopes for astrophotography. Newtonians are often called “light buckets” because they collect so much light. The ability to collect more light is critical to astrophotography, as more light equates to collecting light that’s dimmer and harder to detect.
Newtonians are mounted on top of a tripod with an equatorial mount. If you’re cash-strapped, you can look for a Newtonian with an Altazimuth mount. You may find the performance suitable for planetary viewing and “OK-ish” for deep space observation. If you’re planning for deep space astrophotography, an equatorial mount is the correct hardware.