DC Watch has multiple pictures of different Ricoh GXR prototypes shown on the CP+ Camera and Imaging Show 2010 in Japan. One of them is the previously rumored 28-300mm GXR cartridge:
On display was also a Ricoh GXR A12 28mm f/2.5 cartridge and Ricoh GXR Leica mount cartridge:
as well as Ricoh GXR Hasselblad cartridge:
