New back-illuminated full-frame CMOS sensor
The a7R II has the world's first1 35 mm full-frame CMOS image sensor with back-illuminated structure, which achieves approx. 42.4 effective megapixel resolution, widely expanded sensitivity range2, and extra-low noise performance. It also has no optical low-pass filter that can compromise sharpness, so fine clarity and detail extend from edge to edge of every frame.
High-speed BIONZ XTM image processing engine
With detail-reproduction technology to capture the essence of realism, diffraction-reducing technology to maintain clarity even at smaller apertures, and area-specific noise reduction to reduce noise adaptively and reproduce greater detail, the BIONZ X image processing engine finely tunes the image sensor's 42.4-megapixel data, for truer, clearer depiction.
5-axis image stabilization
This stabilization system is fine-tuned for high-resolution image sensors to compensate accurately for five types of camera shake that can compromise handheld shooting of the camera's 42.4-megapixel images. Camera shake compensation is equivalent to using a 4.5-step4 faster shutter speed, allowing you to take advantage of a wider range of shutter speeds.
Higher-resolution 4K movie recording
Footage from 4K movie recording featuring full pixel readout without pixel binning in the Super 35 mm format exhibits higher resolution and superior clarity than typical 4K movies. Also, the XAVC S5 format allows 4K recording at 100 Mbps maximum bit rate to capture fine details of movement in movies.
Fast Hybrid AF now covers more
The high-performance image sensor enhances Fast Hybrid AF, which far surpasses conventional AF in comprehensiveness, speed and response. The 399 focal plane phase-detection AF points cover 45% of the image area — the most coverage among digital still cameras3 with full-frame image sensors. 25-point contrast-detection AF coverage is also included.
Durable reduced-vibration shutter
The new shutter's braking mechanism cuts mechanical front/rear curtain vibration by about 50%7. Also, use the electronic front curtain for even less vibration. This not only minimizes camera shake that can blur details in 42.4-megapixel images—it makes the shutter durable enough to have been tested to 500,0008 cycles.
Tough magnesium alloy body
Designed for solid reliability and steady handling, the a7R II's compact body is built to withstand the rigors of shooting in the field, thanks to an internal structure and top, front, and rear covers all made of strong, rigid magnesium alloy.