Re: ATM Calculation of Prime Focus.

["Tom Krajci" <krajcit@det5wg57.barksdale.af.mil>]

> From: Donn Starkey <dstarkey@solaris1.mysolution.com>
> 
> I am building a 4x5 sheet film camera for my C-14.  Is there a 
> calculation for how far the film plane should be behind the scope to be 
> at +Prime Focus+?  Or does prime focus just mean +to project an image on 
> a film plane without the use of an eyepice+?

I'm curious what type of corrective optics (field flattener 
especially) you plan to use to get as much of the film area in focus 
as possible?  As I understand it, the field curvature on the C-14 
will make it impossible to use a film area much larger than 35mm 
format unless a field flattener is used.

Also, how much of the film area do you plan on using for actual 
imaging?  Doesn't the baffle tube limit your max film image size?

Tom Krajci

Capt Tom Krajci
B-52 Intelligence Officer
"In God we trust, all others we monitor!"
http://spur.barksdale.af.mil