Hi, I need to build a telescope for my physics class. I need to use any 3 lenses(converging or diverging) and 1 mirror. I was thinking of using an achromatic telescope design for that. However I am not sure what kind of lenses to use and whether I should make the eyepiece from two lenses or just one. Should I use 3 converging lenses? 2 for eyepiece then one as an objective lens? Thank you in advance.