Metered EV
Numerical EV readout above the live preview.
Where to find it
Viewfinder Layers icon Metered EV
Summary
Floating EV100 readout shown above the live preview after each measurement, so you can read exposure as a single number instead of an aperture/shutter pair.
Detail
How it works
What it does
After each measurement the app drops a small chip above the preview that shows the scene's EV100 value (the exposure value normalized to ISO 100) for the spot or area you metered. The chip stays until the next reading.
When to turn this on
Whenever you want a number on the screen instead of deriving exposure from the aperture/shutter readout. Useful for cross-referencing with another light meter, for logging EV readings on location, and for learning what zone numerals on the scale correspond to in stops.
When to turn this off
When you want a clean preview to compose with, or when you already trust the aperture/shutter pair the meter produces and the extra readout is just visual noise.
Note
EV100 is independent of the film ISO loaded. The chip shows the same number regardless of which stock you have selected, so two meters can be compared apples to apples even if one is set to ISO 100 and the other to ISO 800.