What are the eyepieces and filters necessary for astronomical telescopes? Want to go to celestial photography.

What I said upstairs is ordinary photography, not celestial photography, because the subjects in celestial photography generally have low luminosity, which is very different from ordinary photography.

About the eyepiece:

If you use a SLR camera, you don't need an eyepiece. Of course, no matter what camera, eyepiece is ok. There is a special photographic eyepiece, which is actually not much different from the ordinary eyepiece. If not, you can use an ordinary eyepiece.

About filters:

Generally speaking, the most commonly used filter in astrophotography is the optical loss filter. The function of this filter is to reduce the influence of background skylight, which is suitable for use in light-polluted areas. You can also use visual inspection.

If you photograph nebulae, you need a narrow-band filter. For example, Hα filter, OIII filter and so on.