What is Mirrorless?
Well, a camera with no mirror but that probably doesn't help much, so lets expand. A camera with a mirror, uses it to reflect light onto an optical viewfinder or a sensor, the mirrorless style of camera doesn't need to reflect the light, because it can do it electronically, making it less bulky and with fewer complicated internal workings. A fantastic design, it has really taken off with many photographers who are changing their bulky cameras for the mirrorless system, or using them as a second camera thereby keeping weight to a minimum.