as is well known, the main camera smartphone Apple iPhone 7 Plus is double. It is equipped with a lens with 28 mm and 35 MM 56 mm, than is provided by what is missing in models with a regular camera. However, these features may not be enough. In this case the company Kamerar offers case Kamerar ZOOM with nozzles on the dual lens camera smartphone Apple iPhone 7 Plus.
the set includes two interchangeable nozzles. One turns the lens with a smaller focal length in a fisheye lens with a large focal length — in telephoto. In other words, extends the range of focal lengths. The second nozzle improves camera capabilities in the field of macro photography.
price per unit is $45.
source: DP Review