Sharp from
1.67 m to ∞
Hyperfocal
2.52 m
Focused past it, so the far limit is infinity. The near limit is what you are trading away.
Viewfinder
Tap the picture to focus there. Each pixel is blurred by the amount the answer gives for its distance; amber outlines mark what is inside the sharp zone.
A lens brings light from one distance back to a point on the sensor. Light from nearer or farther lands as a small disc instead. While the disc stays smaller than the eye can resolve, it reads as sharp. Depth of field is the range of distances where that holds.
From the side
Distance on a log scaleThe plaques laid out along a scale where 1 m and 1 km both fit. Above each one, the solid circle is the blur disc a point at that distance makes; the dashed circle is the largest that still reads as sharp. Drag to turn it; two fingers on a phone.
Inside the lens
Angles exaggeratedLight from a point spreads out, passes the aperture, and the lens brings it back to a point. Only the focused distance meets on the sensor. Nearer light meets behind it, farther light in front, and both arrive as discs. A smaller aperture narrows every cone, so every disc shrinks.