The Biogon T 2.8/21 ZM features exceptional imaging performance and high resolution even at full aperture, with virtually no distortion. It is free from stray light and reflections, producing excellent contrast across the entire image field. The slim design feels comfortable in hand while focusing.

Like many of the ZM lenses, it has a 46 mm filter thread, allowing a single filter to be used across multiple lenses. The lens enables focusing with a rangefinder. Additionally, a high-quality 21 mm viewfinder is available for image composition. When used on a digital rangefinder camera with a smaller sensor, the lens becomes a 27 mm wide-angle. The Biogon T 2.8/21 ZM is suitable for a variety of wide-angle applications such as reportage, landscape, or architecture.