Dan Bracaglia, DPReview:
The Leica Q2 is a fixed-lens, full-frame camera sporting a new 47.3MP sensor and a sharp, stabilized 28mm F1.7 Summilux lens. It’s styled like a traditional Leica M rangefinder and replaces the hugely popular original Leica Q (Typ 116), launched in 2015.
The Q2 looks essentially the same as its predecessor, but under the hood notable improvements have been made including the addition of weather-sealing, better battery life, a new processor and an improved electronic viewfinder. Sensor resolution has also nearly doubled.
So far, I’ve seen that they’ve fixed at least two of the three major complaints I’ve had with my first-edition Q: they’ve weather- and dust-sealed the body, and they’ve redesigned the on/off control on top so you don’t have to be super precise to select single capture mode. They haven’t changed anything that I love about the camera, from its perfect lens to its wonderful macro control and, judging by the samples I’ve seen, its gorgeous capture quality. If they’ve fixed the Q’s terrible lens cap that falls off all the time when the lens hood is attached — my only other major complaint — this is a home run.