A type of camera lens, or to go really fast
When you bought a DSLR or an interchangeable-lens camera as a 
beginner ... Another big advantage is that they often have faster apertures, 
meaning that ... the lens, but if you don't need zoom, a 50mm prime is always a 
good way to go;... [DOC] [TLE] Which impacts the speed of focusing more, the lens or the camera ... [PAR] Sep 13, 2012 ...