Photo discussion: Is it better to use a card machine for eyepiece back shooting or a Quan Huafu SLR?

Shooting behind the eyepiece ... should be astrophotography ...

In this case, of course, a full-frame SLR is better! This kind of camera has high image quality, especially high sensitivity, and the photos taken are better.

However, the image sensor of the card machine is too small, and the film output effect is very general.