The Nikon Zf outperforms the Ricoh GR IIIx in sensor size, versatility, and overall image quality with its full-frame 24.5MP sensor versus the 24MP APS-C in the GR IIIx (per DPReview and Imaging Resource tests). The GR IIIx wins on portability at 262g versus 630g but sacrifices flexibility with its fixed 40mm lens. Nikon Zf is the stronger choice for most photographers seeking long-term system ...