The iPhone 7 Plus has a dual-camera system with one 12-megapixel wide-angle camera and one 12-megapixel telephoto camera. The wide-angle camera has an aperture of f/1.8, while the telephoto camera has an aperture of f/2.8. The camera system also features optical zoom, digital zoom up to 10x, optical image stabilization, and Quad-LED True Tone flash.
On the other hand, the iPhone 8 Plus also has a dual-camera system, but with improved sensors and processing capabilities. It features one 12-megapixel wide-angle camera and one 12-megapixel telephoto camera, just like the iPhone 7 Plus. However, the wide-angle camera now has a larger and faster sensor, with an aperture of f/1.8, while the telephoto camera still has an aperture of f/2.8. The camera system also features improved image processing, including Portrait Lighting mode and 4K video recording at 60 frames per second.
Overall, while the camera resolution and hardware are similar between the iPhone 7 Plus and iPhone 8 Plus, the iPhone 8 Plus features some significant improvements in image processing and sensor capabilities, resulting in better overall image quality and more advanced features.