At T 1.4 and averaging only 1.7 kg per lens, the SUMMILUX-C lenses are the smallest set of fast aperture, purpose-built prime lenses available for cinematography. Their patent focus design allows for a long focus throw even on these compact lenses.

The magic happens in the design process, where choices in coatings affect the color and contrast, where the inclusion of exotic glass elements and shapes determine the treatment of highlights and focus fall off. It happens in the mechanical design where precision machining gives each focus and iris ring its accuracy with a smooth feel and repeatable action.