Dissecting scope with long working distance for big samples like tumor spheroids, organoids, and C. elegans. Triple Beam Illumination design, with excitation illumination along a 3rd zoom optical path providing enhanced emission signal contrast by elimination of optical reflexes found with designs where the optical paths share both excitation and emission light. It has a Leica K3C Camera. The K3C color CMOS camera provides a well-balanced feature set with high frame rates, very good dynamic range, and excellent color reproduction. It delivers 12-bit/channel RGB quantifiable images.