Diagonal too small to admit 100% ray: | ? |
Vignetting of 75% ray at front aperture: | ? |
Vignetting at focuser of 100% ray: | ? |
Vignetting at focuser of 75% ray: | ? |
Newt for the Web | ||
Title: | ? | ? |
Notes: | ? | ? |
Design Modification Status:
You have saved designs. Selected: Design Name: Current Design Name: This button will 'zero out' everything and you can start with a clean slate. |
The Yellow Sample Design is the build-it-youself Dob at Stellafane.org/tm/dob
Open a .newt File ? |
Save a File to Your Computer ?Accomplished by round-triping through our server. |
The theoretical limiting magnitude for a ? objective is ?.
The obstruction of the primary surface area by the diagonal is ?% which results in a reduction of light gathering ability. ?
The theoretical resolution (Dawes limit) for a ? objective is ? arc seconds.
The obstruction of the diameter of the primary by the diagonal is ?%, which affects image quality by increasing diffraction and lowering contrast. ?
Maximum useful power is about ?x (for 50x per inch of aperture).
Minimum useful power is about ?x (for a 7mm exit pupil).
Angular field of view for the 100% illuminated area is ?°. The diameter is ? ?
Angular field of view for the 75% illuminated area is ?°. The diameter is ? ?
If you see "NaN" where you expected a number, the specifications resulted in incalculable results, such a division by zero or some other mathematical problem. "NaN" is an abbreviation for Not a Number.
Dimensions for your Telescope
|
Dimensions for the Baffles ? |
If you see "NaN" where you expected a number, the specifications resulted in incalculable results, such a division by zero or some other mathematical problem. "NaN" is an abbreviation for Not a Number.
Newt for the Web (Newt-Web for short) is a Newtonian Telescope Computer Aided Design program. It ray traces a Newtonian telescope design checking for vignetting, optimizes diagonal size, calculates baffle sizes and positions, and produces performance and dimensional data for construction. It runs in your web browser - there is no need to install a program on your computer.
To get started:
Use the File tab to load an existing design or sample designs. Newt-Web Release History Copyright © 2011-2024 by Kenneth H. Slater.
E-Mail: newt-web@stellafane.org
https://stellafane.org/tm/newt-web/newt-web.html
Thanks to Dave Tabor, Julian Shull, Matt Considine, Michael Patterson, Dave Prowten, Glenn Becker & Dale Keller
for their help, expertise, ideas and advice during development of Newt-Web.
Newt-Web is based upon NewtWin and the Newt25 sources by Dale Keller;
See Dale Keller's Newt Software Page
Browser Size:
Screen Size:
Newt-Web is released under the GNU General Public License Version 2 (Click link to view).
Source code for the current, running version. Right click and use the "Save Link As..." function to download and save each file.
If you can't download newt-save.php, then download newt-save.php.zip instead. |
Click the Help Icon ? for help on topics it is near. If you hover your mouse over the icon, the help topic it links to will be displayed in a tiny pop-up window.
Help links in the Newt-Web application panes open in a new window in your browser. Note that many people choose an option in their browser to open new windows as new browser tabs (not Newt-Web application tabs).
Application Help includes topics about how to save and restore designs between sessions, features needed to run Newt-Web, which major browsers support Newt-Web, screen sizes, printing, and reporting problems.
Newtonian Design Help includes topics about how to size your optics and telescope components to maximize performance, and how to solve problems that Newt-Web reports about your design.
The release history of Newt-Web is available on this help page. It also explains the version numbering scheme.
Newt-Web is release under the GNU General Public License (GPL) Version 2. Newt-Web source files are available on the About tab.