Like all things digital, the technology in your beautiful new camera is heading towards obsolescence at an alarming rate. The same is true, though to a lesser extent, about that SLR lens with its own processors and motors for focus, aperture and stabilization. In the analog world of manual film lenses where a lifetime of use is guaranteed there has been a renaissance in the manufacture of high quality optics at all price points, driven in part by the advent of digital SLRs and cheaper camcorder options that are capable of delivering that "film look". But for serious moving picture shooting, still camera lenses just won’t cut it. Let’s explore why.