Sensor: Dedicated monochrome APS-C CMOS (no AA filter, no color filter array)
Effective Pixels: Approx. 25.74 million pixels (6192 × 4128)
Lens: Fixed 18.3mm f/2.8 (35mm equivalent 28mm), 7 elements in 5 groups (including 3 aspherical elements)
ISO Range: 160–409,600 (extremely high sensitivity, ideal for low-light monochrome shooting)
Image Stabilization: 5-axis sensor-shift SR
Built-in Filter: Red contrast filter (Red Filter, approx. 3-stop light reduction, enhances black-and-white contrast, e.g., darker skies)
Internal Memory: Approx. 53GB (stores about 2,900 large JPEGs or 937 RAW files — can shoot a lot without a memory card)
Battery: DB-120 rechargeable lithium-ion battery, approx. 250 shots (CIPA standard)
Dimensions & Weight: 109.4 × 61.1 × 32.7 mm, approx. 262g (including battery and memory card)
Other: Monochrome-dedicated image processing (GR Engine 7), electronic shutter up to 1/16000 sec, macro mode, built-in 3-inch LCD (no flip screen), supports microSD card expansion, compatible with GF-2 external flash.

GR4