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(Abridged) In this paper, we present a project of multi-channel wide-fieldoptical sky monitoring system with high temporal resolution -- Small ApertureImaging Network Telescope (SAINT) -- mostly built from off-the-shelf componentsand aimed towards searching and studying optical transient phenomena on theshortest time scales. The instrument consists of 12 channels each containing30cm (F/1.5) objectives mounted on separate mounts with pointing speeds up to50deg/s. Each channel is equipped with a 4128x4104 pixel, and a set ofphotometric $griz$ filters and linear polarizers. At the heart of every channelis a custom built reducer-collimator module allowing rapid switching of aneffective focal length of the telescope -- due to it the system is capable tooperate in either wide-field survey or narrow-field follow-up modes. In thefirst case, the field of view of the instrument is 470 square degrees and thedetection limits (5$\sigma$ level at 5500$\AA$) are 12.5-21 mag for exposuretimes of 20 ms - 20 min correspondingly.  In the second, follow-up regime, all telescopes are oriented towards thesingle target, and SAINT becomes an equivalent to a 1m telescope, with thefield of view reduced to 11$'$ x 11$'$, and the exposure times decreased downto 0.6 ms. Different channels may then have different filters installed, thusallowing a detailed study -- acquiring both color and polarization information-- of a target object with highest possible temporal resolution.  The operation of SAINT will allow acquiring an unprecedented amount of dataon various classes of astrophysical phenomena, from near-Earth to extragalacticones, while its multi-channel design and the use of commercially availablecomponents allows easy expansion of its scale, and thus performance anddetection capabilities.

SAINT (Small Aperture Imaging Network Telescope) -- a wide-field  telescope complex for detecting and studying optical transients at times from  milliseconds to years