1/2.3" Type

At 6.17 by 4.55mm, this is the smallest dedicated camera sensor size covered on this site — smaller than a fingernail, and roughly 1/16th the physical area of a full-frame sensor. It's the sensor long standard in basic point-and-shoot compact cameras and, more relevantly today, in budget-to-midrange consumer drones like the DJI Mini series, where minimizing weight is a genuine flight-performance requirement rather than just a cost consideration.

A Crop Factor Large Enough to Change How You Think About Focal Length

This sensor's crop factor against full frame comes out to roughly 5.64x — by far the largest multiplier on this site's sensor reference. A tiny 4.5mm real focal length reads as a 25mm-equivalent wide angle; a 30mm real focal length reads as roughly a 170mm-equivalent telephoto. Camera and drone manufacturers building around this sensor size almost always print the full-frame-equivalent focal length directly on the spec sheet rather than the real, physical focal length, specifically because the real number is such a small, unintuitive figure that it would be actively confusing to most buyers without the conversion already done.

Depth of Field Is Enormous, by Design

This sensor's circle of confusion works out to roughly 0.0051mm under the diagonal/1500 convention — less than a fifth of full frame's 0.0288mm, the strictest sharpness threshold of any common format, which on its own would narrow depth of field at a fixed real focal length. But the real-world comparison that matters is framing the same shot: this sensor needs a dramatically shorter real focal length than full frame to match a given field of view, and that shorter focal length widens depth of field far more than the tiny circle of confusion narrows it, so depth of field on this format ends up dramatically more forgiving than on any larger sensor once you're comparing equivalent framing. In practice this means near-everything-in-focus imagery essentially by default, even at fairly wide real apertures, which is exactly the behavior most casual point-and-shoot and aerial photography actually wants: a drone shot of a landscape, or a snapshot at a family gathering, generally benefits far more from everything reading as sharp than from a deliberately isolated, blurred-background subject.

Why Background Blur Is Genuinely Hard to Achieve Here

The flip side of this format's depth-of-field generosity is that achieving meaningful background separation — the kind full-frame portrait photographers take for granted at a moderate aperture — is a real, sometimes impossible limitation on this sensor size, since even a lens's widest available real aperture rarely narrows depth of field enough to matter at this scale. Cameras and phones built around sensors this small that claim a "portrait mode" background blur are almost always applying software-based, computational blur rather than achieving it optically, precisely because the physical optics of this sensor size can't produce it naturally the way a larger sensor can.

Where This Sensor Size Genuinely Excels

• Consumer and beginner drones, where every gram saved on sensor and lens assembly directly extends flight time and improves maneuverability.
• Deep-focus landscape and travel snapshot photography, where forgiving depth of field means fewer missed-focus shots from a casual, quick-to-use camera.
• Situations demanding extreme portability and low cost above nearly every other consideration, since cameras built around this sensor size are consistently among the smallest and least expensive available.
• Basic action and dashboard/security-style cameras, where continuous everything-in-focus footage matters more than any selective-focus effect.

Run the numbers yourself in the DoF & Hyperfocal Calculator to see just how far its depth of field extends compared to any interchangeable-lens system — it's a useful illustration of why sensor size, not just aperture, drives how much of a scene reads as sharp. In the Astro 500/NPF Rule Calculator, this format's typically lower resolution and small size combine to produce results genuinely different from any full-frame or APS-C figure, and shouldn't be assumed to scale simply from a larger-sensor result.