Well, what do you consider to be a "medium size sensor"?...APSC? I'm afraid, it's impossible to pack the APSC into the GRD-sized body, especially not if it should maintain its fast and nearly distortion free 28/1.9 lens. It's simply physically and technically impossible. And I'm afraid, there is no commercially available sensor with size just between the currently used 1/1.7" in GRDIV and APSC in GXR modules. Even if they could buy 4/3 from Oly/Pana or let's say smaller 1" sensor from Nikon, it would still require much larger body and especially larger lens, to keep the fast aperture and nearly distortion free design. Check for example the upcoming DP1m and its 28/2.8 lens size...CHICHORNIO wrote:Thanks for answering my post! I think we are in the same train... but... Why Ricoh don´t release a "GXR-like" as a new GRD V camera with a fixed "normal" lens and a medium size sensor?
http://www.dpreview.com/products/sigma/ ... sigma_dp1m
Now consider how big lens would be required for the GRD with APSC and more than 1EV stop faster 28/1.9 lens! In one word - BIG! This is also why the X1 starts at 35/2.8, or existing DP1 at 28/4. And BTW, Sigma's Foveon is even a bit smaller than the APSC used in Ricoh/Leica cameras!
In other words, Ricoh already "did" what you are asking for. It's just called GXR + A12 28mm module. It's basically the GRD-like camera with larger sensor and noticeably improved output over the GRD. But yes, it's probably a bit too large if one is accustomed to the GRD size? Life is not an easy thing