" starting with a 2x lens when you zoom in with the iPhone 7 Plus, the quality is up to four times better than digital zoom in the iPhone 6s "
Optical image stabilization, once a feature limited to the 5.5-inch iPhone, is built into the iPhone 7, compensating for small movements and hand shakiness when snapping a photo to allow for longer exposure times (3x longer than iPhone 6s). There's a new 6-element f/1.8 aperture lens that lets 50 percent more light into the sensor while keeping photos sharp at the edges.
The 12-megapixel high-speed sensor is 60 percent faster and 30 percent more efficient, and there's a new image signal processor with twice the throughput for faster camera performance across the board.
The image signal processor, custom designed by Apple, sets exposure, focus, white balance, and uses wide color capture for more true-to-life images. It features fourth-generation tone mapping and noise reduction, performing 100 billion operations in just 25 milliseconds every single time a photo is taken with the iPhone.
Apple – Introducing iPhone 7
The two lenses create a new zoom feature that allows iPhone 7 Plus users to switch seamlessly between standard 1x zoom and an optical 2x zoom, right within the camera app. Optical zoom is superior to digital zoom because there's no loss of detail, but the 2x optical zoom function also enables better digital zoom for clearer photos up to 10x closer.