What is the focal length of the iPhone 6 camera and how does it impact the quality of the photos taken with the device?

The focal length of the iphone 6 camera is approximately 4.15mm. The focal length affects the field of view and magnification of the photos. A shorter focal length provides a wider field of view, while a longer focal length offers more magnification. This can impact the quality of the photos by influencing the perspective, depth of field, and overall sharpness of the image.