[mental4astro (Alexander)]

Hi all,

I'm looking to dabble with what is really my first experience with refractors. What I'm looking at getting/making my ultimate rich field scope, so something between an 80mm f/5 & a 4"f/4 achromat.

This won't be for photography or high power, nor lunar or planetary, so chromatic abberation isn't a concern for me. But I imagine that a fast refractor will introduce its own set of quibbles. "Field curvature" is one, but how can one best deal with this? Better quality EPs handle this better?

Anything else I need to be on a look out for? Focuser? Design if it comes to a DIY using existing components? Other advantages of Apo over Achro other than chromatic abberation. Anything.

Cheers,

Mental.