What is Sensor size?
Sensor size (Full-frame, APS-C, Micro Four Thirds, 1-inch)
The physical size of the chip that captures light.
Short answer
A 1/2.3-inch compact with 20 MP is phone-class quality, whatever the zoom number says.
Sensor size when buying a camera (mirrorless & compact)
The physical size of the chip that captures light.
Why it matters: Bigger sensors gather more light — cleaner indoor and night shots and softer backgrounds.
Look for: A 1/2.3-inch compact with 20 MP is phone-class quality, whatever the zoom number says.
Full Camera (Mirrorless & Compact) buying guide