  We report the development of a high-time resolution, 3-colour, simultaneous
optical imaging system for the 2.1 m telescope in San Pedro M\'artir
Observatory, M\'exico. OPTICAM will be equipped with three Andor Zyla 4.2-Plus
sCMOS cameras and a set of SDSS filters allowing optical coverage in the
320-1,100 nm range. OPTICAM will nominally allow sub-second exposures. Given
its instrumental design, a wide range of fast-variability astrophysical sources
can be targeted with OPTICAM including X-ray binaries, pulsating white dwarfs,
accreting compact objects, eclipsing binaries and exoplanets. OPTICAM
observations will be proprietary for only six months and will then be made
publicly available for the astronomical community.
