If you are in to your sports and wildlife photography the Sigma 150mm - 500mm is the lens for you, and this great lens will capture some awesome images. Fora review of this lens take a look at this article, whcih also lists the 5 best Sigma lenses for Canon cameras of all time. A useful article if oyu are thinking of buying a new lens for your Canon camera.
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/
Nikon - AF-S NIKKOR 200-500mm f/5.6E ED VR Super Telephoto Zoom Lens - Black
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.