An integral part of the R1 system.

Logic dictates that a lens for an APS-C class image sensor should be optimized for the APS-C frame size. Unfortunately, this logic eludes most previous APS-C class digital cameras. They rely on lenses optimized for 35mm film -- lenses that are far bigger and heavier than necessary. These cameras must provide a mirror box and pentaprism, which add even more bulk.

And 35mm film lenses undergo a focal length conversion of roughly 1.5x. That's great for telephoto shots, but severely limiting for wide-angle photography. Unlike the others, the DSC-R1 lens is meticulously matched to the specific requirements of Sony's APS-C class image sensor. You get an unbeatable combination of optical performance, wide-angle coverage, zoom range, and compact size.