ASTROPHOTOGRAPHY with reflector ?

[Astropheonix]

hello stargazers ,

                            i was thinking about digiscoping with reflector telescoping .btw whats better achromatic refractor of that same aperture or reflector??? ........................ 

happy go clear skies to all! 

[ollypenrice]

Achromats are very poor imaging scopes because their colours don't focus at the same distance. Reflectors are far better. Refractors used for imaging must be apochromats and they they are great!

When you say 'digiscoping' most astro imagers shoot at prime focus, just scope and camera (with correctors, flatteners etc where needed.) It is best to keep the focal ratio fast because you have so little light coming in.

Olly

[Astropheonix]

thanks a lot olly