Gadgets have influenced mankind like never before, life without it feels difficult. As the days are passing technology is evolving and so the the gadget i.e in earlier days gadgets like mobile phones were only used for communication purpose, but now mobile phones does everything!, as said earlier with growth of technology ,many aspects of gadgets have evolved and camera is one of the main aspect among them, as of now let’s concentrate on camera. Now a days mobiles without a good camera is of no use, indeed mobiles are being promoted as, its having quality camera as a one of its main feature. Hence camera is one of the most important feature of mobile. When we hear a word camera, usually we come across words like focal length , aperture , depth of field and so many. So let’s see few among them Focal length – Focal length which is usually denoted in millimeters(mm) is known as the distance between point of convergence and image sensor. Point of c...