Differences between the Ricoh GR III HDF and GRIIIx HDF cameras: RICOH GR III HDF RICOH GR IIIx HDF Lens construction 6 elements in 4 groups (2 aspherical lens elements) 7 elements in 5 groups (2 aspherical lens elements) Focal length, aperture 18.3mm (Approx. 28mm in 35mm equivalent focal length), F2.8-F16 26.1mm (Approx. 40mm in … Continue reading Differences between the Ricoh GR III HDF and GRIIIx HDF cameras