Auto-pro on clipped readings
Smart middle ground. Fast by default, careful when needed.
Where to find it
Viewfinder Metering Mode icon Options tab Auto-pro on clipped readings
Summary
Reads instantly on normal scenes; automatically escalates to Professional metering for individual readings where the scene clips. Sub-entry of CSV row 2.17 (Metering precision selector).
Detail
How it works
What it does
Most of the time the app reads instantly, just like Fast mode. But when it notices that the scene has parts that are too bright (white-out highlights) or too dark (pitch-black shadows) for Fast mode to read accurately, it automatically switches to the precise Professional measurement just for that one reading.
Why this is useful
You get Fast mode's speed on normal scenes and Professional mode's accuracy only when the scene actually needs it. No need to remember which mode you are in or toggle a switch every time the lighting changes.
What is the trade-off
Most readings stay instant. Readings on tricky scenes take an extra half to one second while the app does the careful measurement. The app shows the same spinner either way so you will see when it is escalating.
Recommended for
Everyday use. This is the setting most photographers will want most of the time. Keep it on and forget about it.