Mirrorless cameras have come a long, long way over the past few years. The basic idea is eliminating the mirror and optical viewfinder you find in an SLR in order to keep the size and weight of the camera down. At first, no one really knew what to call them—so you may have heard about compact interchangeable lens cameras, hybrid cameas, compact system cameras, or something else. But rest assured, they’re all pretty much the same thing.
Early models fulfilled the promise of SLR-like image quality in a smaller form factor, but suffered from slow autofocus and limited burst shooting. Those days are, for the most part, over. Entry-level models can still be a little pokey in terms of focus, but as soon as you get into the midrange you’ll find that many models match SLRs in focus speed, and better them when focusing during video recording. Because of their slim design, these cameras give you the option of buying modern native lenses or mounting older SLR and rangefinder lenses via a simple adapter.
The first models to hit the market were part of the Micro Four Thirds system, a mount and lens system that’s shared by Olympus and Panasonic cameras. Those were soon joined by Sony and Samsung, and later by Pentax, Fujifilm, and Nikon—and each of those companies use its own proprietary lens system.
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