ATM focal plane size for 2" eyepiece?

["Michael D. Crawford" <crawford@goingware.com>]

If I were to use 2 inch outside diameter eyepieces on my telescope, what is the
largest focal plane diameter I should plan for?  

I've only ever used 1.25" eyepieces before.

If you have a long focal length 2 inch eyepiece handy, maybe you could hold up a
ruler to your field stop and tell me how big it is.  Or do they go as big as the
inside diameter of the eyepiece tube?

My other criterion here will be how long one frame of 35 mm film is, let's see -
the space inside the mounting of one of my slides is 34mm, or 1.34 inches.

I need to make a design for my telescope, so far I've decided to make it a
Ritchey-Chretien with an f3.5 primary, but I haven't figured out the overal
effective focal length I'll use or the dimensions of the secondary.

Mike
-- 
Michael D. Crawford
GoingWare Inc. - Expert Software Development and Consulting
http://www.goingware.com
crawford@goingware.com

  Tilting at Windmills for a Better Tomorrow.