I love primes, primes are great. They offer a lot of advantages compared to zooms. But if they are fixed (as in non-interchangeable), they impose a limit on subject choice. This is the case with smartphones.
Usually phones have a fixed prime lens with a full frame equivalent focal length of 30mm to 35mm – a photojournalist’s of old favourite focal length. The “not too wide” wide-angle is a very flexible FL that allows you to shoot all kinds of subject. Some of the things you can’t shoot with it, however, are macro, landscapes with the super wide angle “look” and photos with a certain effect, like the circular fisheye effect.
This is where additional lenses come in. There are a number of such add-on lenses for your smartphone. Sometimes they even come in so called “kits”, consisting of three lenses – a super wide-angle, a fisheye and a macro lens. One of the cheaper kits is the TaoTronics Phone Camera Lens Clip Kit for 12 bucks. As you will see in course of my review, image quality isn’t always great, or even good, but there is a huge benefit in terms of flexibility.