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During the shoot · Framing & metering

Focal

Equivalent focal length conversion, depth-of-field calculation and a macro mode — work out equivalent angle of view and DOF across formats.

When it helps

focal length
equivalent focal length
crop factor
depth of field
DOF calculator
macro
angle of view
format conversion
hyperfocal distance

At a glance

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

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“Focal” 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.