Pity that Nikon Lenses - with the F mount - will probably not be worthwhile on this body with such a small sensor. The Sony Nex is closer to the mark with an APS sensor. I passed on the 4/3rd system since it was a bit smaller than the APS sensors that Sony and my Nikon digital SLR's use. What I am hoping for is a full frame mirrorless body that lets me use the dozens of great lenses in my collection. In the meantime the Nex-5 is the best game in town for a collector who enjoys using his old glass.