A 70 - 200 zoom lens is a must have lens for all photographers. If you shoot a Canon dslr camera you won't go far wrong with the 70 - 200 f2.8L IS USM lens. This is a very popular lens amongst professional photographers and when you see what this lens is capable of it is easy to see why.
Sony Attachable Zoom Lens For Smartphones / The Sony DSC-QX10/W is a zoom lens and sensor that turns your smartphone into what looks like a conventional camera. http://thegadgetflow.com/portfolio/sony-attachable-zoom-lens-smartphones/