“Features of RICOH GR IIIx HDF ＊The built-in HDF (Highlight Diffusion Filter) allows for softer, more emotional and affective expression. ＊The HDF ON/OFF function can be quickly changed with the Fn button. ＊””HDF”” is printed on the back near the Fn button. ＊The shutter button painted in dark silver differentiates it from the regular model. ＊The new functions have been added, 1. Users can register up to 3 custom white balance settings. You can set a combination for base white balance and white balance fine adjustment. 2. “Zone select AF” has been added. This allows you to move the 3×3 focus area around the frame using the touch screen. It will then automatically focus on the appropriate AF points within the zone selected. This give more freedom over Auto-area AF (Center) where the 3×3 grid is fixed in the center of the frame. ※The 3×3 area is the same size as the conventional “Auto Area AF(Center)” *Note: These 2 features can be added to the standard GR III/IIIx model by installing the latest function expansion firmware.”