The IMX661 (Pregius 4. Gen) is a 127.68-megapixel M/C image sensor manufactured by Sony. It delivers a 13400 × 9528 pixel array with a 3.45 µm pixel pitch, providing efficient photon collection at each photosite. The optical format spans a 56.725 mm diagonal with a 1675:1191 aspect ratio, placing it in the large-format category used in cinema, scientific, and aerial imaging. With 3.45 µm pixels, the sensor features compact pixel pitch suited for high-resolution imaging in space-constrained camera designs.