1" Type

The "1-inch" sensor name is one of photography's more misleading pieces of terminology — the sensor itself measures 13.2 by 8.8mm, nowhere close to an actual inch across, and no dimension of the physical chip. The name is a holdover from old vacuum-tube television camera sizing conventions, where "1 inch" referred to the outer diameter of the tube, not the sensitive imaging area inside it. Digital sensor manufacturers kept the naming convention even after the underlying technology it originally described disappeared entirely, and it's stuck ever since.

A Genuine Middle Ground

This format's 2.7x crop factor sits in a deliberate middle zone — dramatically larger than the tiny sensors found in older compact cameras and current smartphones, but still small enough to fit into genuinely pocketable bodies and lightweight drones in a way full frame, APS-C or even Micro Four Thirds cannot. That middle position is exactly why manufacturers chose it for two very different product categories that share one underlying requirement: meaningfully better image quality than a phone or a truly tiny sensor, in a package small enough that portability isn't compromised.

Premium Compacts: Real Image Quality in a Pocket

Cameras like the Sony RX100 series and the Canon PowerShot G7 X built an entire premium-compact category around this sensor size specifically, positioning themselves as a genuine step up from smartphone photography for photographers who want a fast zoom lens, real manual controls, and noticeably better low-light and depth-of-field capability than a phone's tiny sensor allows — all in a body that still fits in a jacket pocket, which a full-frame or APS-C camera with an equivalent zoom range generally cannot match.

Drones: Weight Is the Real Constraint

Consumer and prosumer drones face a different but related constraint: every gram of sensor and lens assembly directly reduces flight time and maneuverability, so drone manufacturers gravitate toward the smallest sensor that still delivers genuinely usable image quality for aerial photography and video. This 1-inch format has become the de facto standard for higher-end consumer drone cameras for exactly that reason — meaningfully better than the very small sensors in budget drones, without the weight penalty a larger sensor and its accompanying lens assembly would impose on flight performance.

Depth of Field: The Tradeoff of Going This Small

This sensor's circle of confusion works out to roughly 0.0106mm under the diagonal/1500 convention — under half of even Micro Four Thirds' figure, and well under a quarter of full frame's — which means depth of field is dramatically more forgiving on this format than on any interchangeable-lens system covered elsewhere on this site. That's a genuine advantage for run-and-gun compact shooting and aerial video, where near-everything-in-focus footage is usually more useful than a shallow, deliberately isolated subject, but it also means achieving strong background separation on a 1-inch sensor camera is a real, sometimes frustrating limitation compared to a larger-sensor system at an equivalent field of view.

Run the numbers yourself in the DoF & Hyperfocal Calculator or the Astro 500/NPF Rule Calculator to get accurate figures for a premium compact or drone camera rather than assuming full-frame numbers, which would understate this format's actual depth of field and overstate its usable astro shutter speed. Resolution on this sensor size, entered into the Print Size / DPI Calculator, also holds up better than the small physical sensor size might suggest — print size depends on pixel count, not sensor area.