Newt Software (Newtonian CAD program) Newt is a Newtonian telescope design program. It ray traces the telescope checking for vignetting, optimises diagonal size, calculates baffle size and position, and a lot more. It allows you to easily and quickly change any of the design parameters of the telescope and to see the results immediately.
Telescope Optical Parameters Calculator v.3.1a For anyone desiring a simple utility to calculate various telescope characteristics, the Telescope program is offered free for download , and is hereby released as-is to the Public Domain, without any warranty, guarantee or claim of suitability for any specific purpose.