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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
Tags: astrolight full7.
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.