Exposure Compensation +/- EV
Sticky EV-comp dial that shifts every reading by a fixed offset.
Where to find it
Viewfinder EV-comp dial
Summary
EV-comp dial from -5 to +5 stops in third-stop increments. Whatever you set here is added to every metered reading until you change or reset it.
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How it works
The EV-comp dial is the standard way to override the meter's middle-grey assumption. Set it to +1 and every reading from then on is one stop more exposure than the meter would give on its own; set it to -2 and every reading is two stops less.
When to compensate up
Bright snowscapes, beaches, and other scenes where the meter sees mostly white and tries to correct it back to grey. +1 to +2 stops keeps the snow looking like snow rather than grey slush. Same with backlit subjects where the bright background fools the meter.
When to compensate down
Spotlit subjects against dark backgrounds, where the meter overcorrects for the dark surround and blows out the lit subject. -1 to -2 stops brings the highlight back. Also useful for slide film where you want to underexpose by 1/3 stop for richer color.
How it stacks with other compensations
EV-comp is applied first in the solver. Filter factors, expired-film comp, bellows comp, and reciprocity all stack on top in their own order. So a -1 stop EV-comp plus a 0.6 ND filter (-2 stops) plus +1 stop expired film stops nets to -2 stops total, which is what the wheel will show.
Resetting
Tap the dial center to snap back to 0. The setting persists across app restarts, so leaving the comp dialed in by accident is a common mistake; check it before starting a new roll.