1/2.55-inch type Lenses
5.6448 x 4.2336 mm image area · 1 interactive lens diagram
Smartphone main cameras, including the Samsung Galaxy S9 | Nominal 5.6448 x 4.2336 mm capture area with a 7.056 mm diagonal and 4:3 aspect ratio
Samsung specifies the Galaxy S9 main camera as 1/2.55-inch type with a 4:3 aspect ratio and 1.4 µm pixels. The catalog's nominal capture area follows from 4032 x 3024 pixels at that pitch. The inch-type designation is a historical optical-format label, not a physical diagonal in inches. Sensor implementations and usable crops can vary.
This format identifies the intended capture area for catalog grouping and image-field calculations. A patent model associated with a production camera can still have incomplete aperture geometry; assigning the sensor format does not certify that the reconstruction reproduces the production lens's full-field performance.