The dual camera setup has a 12 - megapixel colour sensor and a 20 - megapixel monochrome sensor. (zdnet.com)
There is a 12 - megapixel colour sensor, coupled with a 20 - megapixel monochrome sensor. (pocket-lint.com)
Adopting a similar setup to the (now pretty much irrelevant) P10 Plus, the Mate 10 Pro features a 12MP colour sensor with f / 1.6 27 mm equivalent optically - stabilised lens, sat vertically alongside a 20MP true monochrome sensor with the same f / 1.6 27 mm equivalent optic (but without optical stabilisation in this instance). (pocket-lint.com)