Different mirrorless cameras come with various-sized sensors, and this is where things can get a little confusing. To make things simple, think of a full-frame DSLR camera as having the largest sized sensor, and a point-and-shoot as the smallest sized sensor. Most mirrorless cameras fall somewhere in the middle, packing an APS-C sensor, which is common in consumer DSLR cameras, or a Micro Four Thirds sensor, which falls between an APS-C sensor and a point-and-shoot. While they are the minority, there are now a few cameras that do have a full-frame sensor, and there will probably be more to come in the future.