The Zeiss Compact Prime CP.2 135mm/T2.1 PL Mount with Imperial Markings is a cine prime lens designed for filmmaking and video production applications. Aside from great optics and mechanics, it offers broad flexibility in the areas of camera compatibility, follow-focus compatibility, and shooting capacity. The CP.2 135 is ideal for portrait shots. The long focal length allows a working distance that avoids distortion and a narrow angle of view that can focus in on the foreground. A shallow depth of field native to telephotos further isolates the foreground from the background. The optics and mechanics are superior too. The lens incorporates two aspheric lens elements and two special types of glass with abnormal partial dispersion that exceptionally corrects for chromatic aberration. Zeiss-famous T* anti-reflective coating along with internal light traps provide advanced flare suppression. Fourteen high-precision iris blades open up consistently circular across all T-stops, allowing impressive highlights in out-of-focus areas and producing smooth bokeh. As for high flexibility, in addition to the interchangeable-mount system, the CP.2 135, like the rest of its family, provides full coverage of full frame 24 x 36 sensors. Accordingly, it can, now or at a future time, be used with any 24 x 36 sensor camera, such as the Canon 5D and 1DC and the Nikon D800. The lens also offers follow-focus flexibility. Across the entire CP.2 family, the front diameter is consistent, focus and iris gears are standard, and the housing is cine-style, offering thus compatibility with all standardized follow-focus systems. In addition, the CP.2 135 also offers a focus ring rotation of a manual 300° and as such allows accurate follow-focusing. Yet back to flexibility -- for anyone who wants to take advantage of the 4K shooting capacity of many of the cameras being released, the entire CP.2 family, with the 135mm included, is 4K-compatible.