The MultiScape100 CIS is a multispectral push-broom imager primarily designed for earth observation applications as a payload for CubeSat satellites. It is based on a CMOS image sensor and a multispectral filter in the visible and near-infrared (VNIR) spectral range. The MultiScape100 CIS provides continuous line-scan imaging in up to 7 spectral bands, each with digital time delay integration (TDI). The optics have a large aperture diameter and long focal length within a compact form factor, resulting in a ground sampling distance (GSD) of 4.75 m at an orbit height of 500 km. The modified Cassegrain optical design brings performance to the edge of the object field over the whole spectral range at an ultra-low distortion. The MultiScape100 CIS is engineered to withstand the rigours of the space environment and maintain performance across a wide temperature range. Its compact form factor is optimised for integration into 3U or larger CubeSat structures.