The Zeiss T lenses offer the highest possible level of performance, reliability, and image quality. For example, extremely advanced flare reduction is available for razor-sharp and brilliant images. The virtually non-existent geometric distortion ensures precise, accurate reproduction of shapes, which is especially useful in product and architectural photography. Zeiss T ZM bayonet lenses are designed to minimize the usual shift in the plane of focus when stopped down, an important and valuable innovation for rangefinder photography. This provides the user with greater accuracy when setting distance via the rangefinder. The precise aperture with ten blades and detents in 1/3 stops ensures accurate exposure.

Photographers want to guide the viewer through the image. A minimal plane of focus is often used as a design element, deliberately keeping the background out of focus and drawing the viewer's attention to the actual subject. ZM lenses have apertures with ten blades that form an almost circular aperture, creating a particularly harmonious effect of the out-of-focus areas of the image, known as "bokeh."

Manual adjustment of the lens allows for controlling the image results directly. Ergonomic design is crucial in this regard. The focusing ring on Zeiss lenses is optimal for fast, precise lens adjustment, thanks to ease of use and an ergonomic finger rest. Changes are immediately visible in the viewfinder. The mount and control elements of the ZM lenses are made of metal and designed for decades of intensive use. The quality craftsmanship of the all-metal mounts, the easy-grip metal focus and aperture ring, and the robust front bayonet and filter thread ensure a fantastic photography experience.