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Newt is a Newtonian telescope design program. It ray traces the telescope checking for vignetting, optimizes 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.

NEWT features:

  • Display a side view of a Newtonian telescope.

  • Modify parameters like mirror diameter, diagonal minor axis, focuser height, focuser inside diameter, tube inside diameter and thickness, and many more.

  • Use inches, centimeters, or millimeters as the unit of measure.

  • Calculate baffle size and placement.

  • Calculate diagonal offset.

  • Calculate fields of 100% and 75% illumination.

  • Load and Save files.

  • Eyepiece table includes focal length, power, exit pupil, apparent field, and true field.

  • Check for minimum useable diagonal minor axis.

  • Check for vignetting at the focuser.

  • Check for vignetting of true field by top of tube.

  • Calculate obstruction percentages for light loss and contrast reduction.

  • Cast three rays through telescope - an on-center ray, a 100% light zone ray, and a 75% light zone ray. Use these to check for vignetting at focuser, true field cutoff, etc.

  • Print specifications and dimensions to a printer (see note).

Note: There is a bug in the printer code. It will probably not print correctly on most modern printers. Sorry.

Newt Requirements:

  • Newt version 2.5 runs under Windows 3.1, 95, 98, ME, NT, 2000, or XP.

Newt is was written, published and is owned by Dale Keller.

  • This page is published with permission.

  • Newt is "freeware". No donations or payment is required. Use it and enjoy.

  • If you'd like to go directly to Dale Keller's Newt page, please click here.

  • DOWNLOAD NEWT now.

  • Here is a WEB version of NEWT available on the Stellafane website. It works great.

 

 

 


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