There is no best lens for everything. It depends on every situation. Wide angle lens (94 degrees) to emphasise space and freedom, or even some establishing shots. Standard (43 degrees) for a natural and realistic feeling. Telephoto (22 degrees) is when you want to get kinda personal with your audience or closeups in general.[DOUBLEPOST=1474328818,1474328640][/DOUBLEPOST]Also, Here is the best lens kit for iphones in the world:
CamKix Camera Lens Kit for iPhone 5 / 5S including 8x Telephoto Lens / Fisheye Lens / Macro Lens / Wide Angle Lens / Tripod / Phone Holder / Hard Case / Velvet Bag / Microfiber Cleaning Cloth (search it up on amazon)