Detailed knowledge of local geoid surface has become increasingly important in order to fully use the potential of accurate geocentric positions, provided by GNSS. Recent advances in a number of scientific and technological fields – accurate astrometric reference star catalogs, development of digital imaging technology, high accuracy tiltmeter technology, and geocentric coordinate availability using GNSS – have made it possible to use astrometric methods for accurate, fast and automated determination of vertical deflections. Such measurements can give important contribution in determination of local geoid properties. Zenith cameras for this kind of measurements have been developed by several research groups. However, accessibility to these instruments is limited. The institute of Geodesy and Geoinformatics of the University of Latvia has engaged in a project to develop its own digital zenith camera that is portable and reliable using off-the-shelf components as much as possible.