On the connection of SLR to astronomical telescope

In principle, any astronomical telescope with a connecting ring can be connected to a SLR for direct focusing photography. The so-called direct focus is "direct focus", which is equivalent to using Skynet as a telephoto fixed-focus lens. 60D is APS-C((24.9× 16.6mm) format, which does not require high aperture of Tianwang focusing base, but it is recommended to use a 2-inch photographic sleeve and adapter ring to connect SLR.

In addition, the painter 80DS is an achromatic lens after all, and the residual chromatic aberration is still relatively large, which will be more obvious when shooting Gao Fancha targets. If you like Sirius, I recommend you to consider ED lens's "Dan Qing shou" ED80DSS-APO. It's an 80/480 F/6 system, which can shoot scenery without feeling the focal length is too long.

The relationship between positive and negative images is the same as that of ordinary lenses.