Sources close to producing cameras for Apple phones recently published a photo, which shows the protective stickers for the main camera module of all four models of the iPhone 12. It is worth admitting that in terms of design of the camera novelties have not gone far from the predecessors.
Judging by these photos, 5.4-inch iPhone 12 and 6.1-inch iPhone 12 Max will get identical external blocks of the main camera, which contains two image sensors each and an LED flash.
In this case, the 6.1-inch iPhone 12 Pro and 6.7-inch iPhone 12 Pro Max will have cameras with three image sensors, as well as an additional hole, which is expected to be designed for laser rangefinder (lidar).
It should also be noted that the iPhone 12 Pro Max camera will be larger than the iPhone 12 Pro, that is, it is expected to have at least a higher quality lens. The image sensors, judging from the previous information, should be the same.