Magna Calc

No way to store the information about your telescopes and eyepieces. You should be able to easily select a scope and eyepiece from your collection, and see the magnification, TFOV, and exit pupil. To have to put in the info each time is ludicrous. I’d feel taken if this free. That it’s a paid app is unforgivable.

Great improvements and updates for this app. Now utilizing modern iPhone features to help astronomers.

Its simple and the key pad is a good idea. But this calculator requires you know your f ratio in millimeters. I can figure that out, but I think a good calculator should not require you provide some of the calculating yourself. Any scope owner would know their mirror size in inches and focal length f ratio, calculating from those figures would be more useful.