The main camera isa 12-megapixel f1.5/2.4 variable aperture lens. This will be supported by a super wide 16-megapixel sensor with f1.9 aperture and a 120-degree field of view, as well as a 13-megapixel telephoto lens (aka optical zoom) with an f2.4 aperture.
Samsung Galaxy S10 triple camera configurations leaked
OLD - UPDATED WITH ORIGINAL SOURCE (JULY 6TH)