The Zeiss Master Prime super-speed lenses are both fast and have an optical performance surpassing that of all standard speed primes. These lenses open up new creative opportunities of film making. Unique high speed prime lenses with unprecedented resolution Virtually no breathing Master Prime lenses offer excellent optical performance across the whole T-stop range from T1.3 to T22 The patented Dual Floating Elements technology eliminated breathing in the Master Prime lenses Uniform positions of iris and focus gears Built-in Lens Data System (LDS) The Master Prime lenses open up new creative opportunities, making shots possible that would have been considered impossible before. A widest stop of T1.3 allows shooting in low or available light for more natural-looking shots and a reduction of the lighting budget. In addition, a wide open stop creates the cinematic look of an extremely shallow depth of field.