The a7RII's newly developed 35mm Exmor R CMOS sensor is the world’s first full-frame sensor with back-illuminated structure. The structure combines gapless on-chip lens design and AR (anti-reflective) coating on the surface of the sensor's glass seal - with no low-pass filter - to dramatically improve light collection efficiency, even though the pixels are smaller than the ones in the a7R. Moreover, the wiring layer now uses copper (instead of aluminum) wiring for faster transmission speed2. The results are truly remarkable – with incredibly detailed 42.4 megapixel stills and 4k video with high sensitivity - up to ISO 102,4003, low-noise performance and wide dynamic range that are superior to previous models.
The 5-axis SteadyShot INSIDE image stabilization system is fine-tuned for high-resolution image sensors. It accurately compensates for blur caused by camera shake from five different directions—vertical, horizontal, pitch, yaw and roll—as opposed to only two in previous systems. The 5-axis image stabilizing system excels during video recording and even compensates for blur caused by the photographer walking or running. It’s a true marvel of engineering. You can even monitor the stabilizing effects of camera shake compensation in the viewfinder or LCD screen while shooting still images by pressing the shutter button halfway or magnifying the image, and while shooting movies by entering movie mode.
The a7R II is the world’s first camera to offer 4K movie recording to internal media in the full-frame format. It also provides you the option of shooting 4k in the super 35mm format. Enjoy the expansive power that the full-frame image sensor can express in 4k with direct pixel readout and no line skipping. In super-35 format, the α7R II employs oversampling with full pixel readout and no line skipping or pixel binning - resulting in images that exhibit higher resolution and less moiré and jaggies than typical 4K movies. Fast hybrid AF with 399 phase detection AF points and 5-axis image stabilization take movie making to a new level.
Fast Hybrid AF with 399 focal plane phase-detection AF points