In the past years I often found patents for liquid lenses for mirrorless cameras. Patented by Sony, Fuji, Nikon and many others. These lenses would be extremely compact and focus would work near instantly. This isn’t a distant dream or something that will never make it int a real product. The image on top shows you the world first liquid mirror that just has been installed in Humilaya. More about that can be read at Universetoday. One day you will see such lenses on your regular mirrorless camera too!