Continuous,　single-mode　imaging　systems　fail　to　deliver　true-color　high-resolution　imagery　around　the　clock　under　extreme　lighting.　High-fidelity　color　and　signal-to-noise　ratio　imaging　across　the　full　day–night　cycle　remains　a　critical　challenge　for　surveillance,　navigation,　and　environmental　monitoring.　We　present　a　competitive　dual-mode　imaging　platform　that　integrates　a　155　mm　f/6　telephoto　daytime　camera　with　a　52　mm　f/1.5　large-aperture　low-light　full-color　night-vision　camera　into　a　single,　co-registered　26　cm　housing.　By　employing　a　sixth-order　aspheric　surface　to　reduce　the　element　count　and　weight,　our　system　achieves　near-diffraction-limited　MTF　(＞0.5　at　90.9　lp/mm)　in　daylight　and　sub-pixel　RMS　blur　©　2025　by　the　authors.