What cameras are good for astronomy, 5d3 and d800e?

When used in astrophotography, 5D3 is better than D800E.

In astrophotography application, the most critical parameter is the sensor sensitivity. Both of them are 36×24 CMOS full-frame machines, but the former has only 23.4 million pixels, while the latter has 36.77 million pixels. The former is much larger than the latter in single pixel size, and it will also have great advantages in sensitivity. From the specific effect, that is, under the same ISO, the former can get lower noise; Under the same exposure time, the former can obtain higher useful contrast.

Of course, the specific shooting effect is also affected by atmospheric visibility, transmittance, ambient temperature, tracking accuracy of the bracket (Hoshino Equatorial Telescope), polar axis accuracy, wind and condensation. In short, photographers need to have a very high comprehensive technical level, and celestial photography is very hard and even dangerous.