Manual Flash Calculator for Android
Key Features:
• Aperture range F/1.2 to F/22 in 1/3 stop increments
• ISO 50 to ISO 6400 in 1/3 stop intervals
• Flash output fractions from 1/1 to 1/128th power
• Flash exposure compensation to +/- 3.0 EV
NOTE
Manufacturers can be a little optimistic about their published flash Guide Numbers, particularly for scenes that lack reflecting surfaces (eg. outdoor locations). Also be aware that the guide number for flash units with zoom heads is different at each zoom setting.
This does what I need from a flash calculator. Sticks to the standard formula. Other apps do weird variations. Clear, high contrast screen.
Flashes are getting more economical, but some may be missing features of pricier models. This app replaces the guide number calculator. Works great, though a bit pixilated for tablets. Would also love to see distance available in feet.
best for photography
by M####:
My only suggestion is to make the GN editable from the main screen instead of the settings. Fantastic tool. If possible, a great feature would be to have a flash GN determiner. So I could tell the app how far it is from the flash and then trip the flash and the app would give me the GN. I'd pay for that feature.