Download AstroLight+Calculator apk 1.7 free for Android smartphone
Apk file size: 248.0 KB
This is a simple tool for astronomers, providing two functions. It's a combination of an astronomy light/flashlight and an astronomy calculator. First, it turns your device screen into a variable-intensity red light, to preserve your dark-adapted vision. The intensity is changed by touching the screen in different vertical positions. Second, it evaluates the telescope equations to provide resolution, magnification, surface brightness, etc., as well as recommendations for optimum viewing. There's also an embedded RPN calculator that pops up when an entry-box is clicked.
Note that your screen will stay on as long as you have this app open. Thus, you should turn off the screen when you are done in order to preserve your battery.
This application requires no permissions and is ad-free.
A good reference for the telescope equations, which I used in preparing this app, is available at
If you aren't familiar with how to use an RPN calculator, check out
keywords: astronomy, telescope, night, flashlight, light, equations, calculator, resolution, magnification
V1.6: Added presets for common Celestron and Meade telescopes.
V1.6: Improved interface appearance.
V1.5: Added preset buttons for common magnification requirements. Fixed bug in swipe updates.
V1.4: Pop-up calculator and checkboxes are now red and grey to reduce impact on night-adapted vision.
Michael Borland part of our Education and have average installs from 50 to 100. Last Update Aug. 8, 2013. Google play rating is 100.0. Current verison is 1.7. Actual size 248.0 KB.
great app Works great. Very handy for observing .