© 2011 Wazari Wazir | Mother and Son at Kinokuniya Book Store | 50mm | f/1.8 | 1/125 | ISO 1000 Before we talk about when and why do you need a fast lens, lets get to know what is fast lens for those of you who doesn’t know about it. Basically “Fast Lens” refer to the lens that have big aperture at its maximum aperture. Usually any lens that have its maximum aperture which start at f/2.8 and below is consider a fast lens. The reason that a lens with a big maximum aperture is referred to as fast is that it lets more light in and therefore you can use…