Canon's 450D 40D and Nikon's D50 are more suitable for entry-level astrophotography.

Canon is definitely the first choice for astronomy.

Because astrophotography focuses manually by connecting a telescope, Nikon D90 didn't use live view before, and Canon has had it since 450D, which can zoom in 10 times and focus accurately. Using automatic telephoto lens is not suitable for astronomical shooting. First, the multiple is not enough, and the super telephoto lens can't be bought by ordinary people. Secondly, celestial bodies are very dark and small objects, so it is useless to autofocus and measure light with a camera.

Secondly, Canon is less noisy than Nikon. Although Nikon's noise reduction seems to be stronger than Canon's, Canon's noise reduction is still very powerful in the 450D era, and many details can be preserved. Nikon's noise reduction generally regards the stars as noise, which is very bad for astrophotography!

The third is that Canon faithfully restores colors, and it is useless to beautify photos by default like other brands. Although it looks beautiful, it is also very unfavorable for post-production in celestial photography.