Although certainly not the fastest lens (optically or workflow-wise) the SEL55210 is a screaming bargain at $399. The lens is light and compact enough to bring along â€œjust in caseâ€, something that can’t be said of many, SLR tele-zoom lenses. Once it finally focuses, image quality is excellent and the built-in Optical SteadyShot makes it usable even in low light conditions.
Advanced interchangeable lens camera systems like the NEX from Sony are never entirely open or closed. Rather, they incorporate standards where they must and innovate everywhere else. Let’s consider the main components of interchangeable lens camera, and identify which generally are proprietary and which are standardized.