Somebody converted their Ricoh GRIIIx camera into Monochrome (DIY)
There have been some rumors about a Ricoh GRIII Monochrome camera in the past.
An old Ricoh patent (2016-201400) suggested a Bayer sensor without a color filter array (CFA) for sharper monochrome images.
Check out this amzing Ricoh GRIIIx Monochrome DIY conversion performed by a fan in China (more videos available here):
Sample photos:
