Aperture f/0.95 to f/64 with half/third stops
Pick aperture in full, half, or third stops across the entire practical range.
Where to find it
Viewfinder Aperture chip, or Equipment tab Lenses
Summary
Aperture chips covering f/0.95 (Noctilux, Mitakon Speedmaster) all the way to f/64 (large-format work) with a stop-increment toggle so you can step in full, half, or third stops to match your camera's click-stops.
How it works
Range coverage
f/0.95 covers the fastest production lenses (Leica Noctilux, Mitakon Speedmaster); f/64 covers the smallest practical aperture for large-format and macro work. Everything in between is one chip away.
Stop increments
Toggle between FULL, HALF, and THIRD stops. Most modern cameras click-stop in thirds; older mechanical cameras click in halves; very old cameras click only in full stops. Match the increment to your camera and the recommended apertures will always be values you can actually set.
Standard chips vs custom
Each entry in the StandardAperture enum is a known click-stop (f/1.4, f/2, f/2.8, f/4, f/5.6, etc.). For lenses with unusual maximum apertures, see 1.3 for custom f-stop entry.
How it feeds the solver
When you pick aperture priority, the app holds your aperture and varies the shutter to match the metered EV. The exact aperture you pick is what shows up in the recommendation, so tightening the increment to thirds gives you finer control over depth of field.