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During the shoot · Framing & metering

Exposure

An exposure calculator: ND filter stops × shutter speed conversion, long exposures, linked to reciprocity failure compensation.

When it helps

exposure
metering
ND filter
neutral density
long exposure
shutter speed
aperture
exposure triangle
slow shutter

At a glance

Where to find it	Tools tab → Exposure
Category	During the shoot · Framing & metering
Platforms	iOS / Android / HarmonyOS (native) (coming soon)

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“Exposure” is one of the 37 photography tools in Optaxis. Coming to iOS, Android and HarmonyOS (native) at the same time, expected between late December 2026 and early January 2027; once live, search for “光轴” (Optaxis) in your app store to download.