The lens that Epson uses on the 3100Z is a Carl Zeiss lens(F2-8). This is one of the reasons that the Epson is such a great camera. The menus are easily used, so advanced photographers can do their work and neophites can just point and shoot. The media card needs to be upgraded to at least a 64 card, I prefer a 128. The camera can easily handle a 256, so if you are going on a long trip it can take several hundred mid grade pictures. The panorama feature is really neat, as is the pixel computer shift to over 4mgs. It is a very well made camera, by a very service orientated manufacturer. Great camera Epson!