After the DSLR, the next step is the cooled astronomy camera: why it reduces thermal noise, when to choose a colour or a monochrome camera, and the features of the ZWO ASI1600MM Pro I have used since 2022.
Why the mount matters more than the telescope in astrophotography: what an equatorial mount does, the features of the Sky-Watcher EQ6-R Pro, and the steps to use it, from setup to alignment.