Introducing the world’s first mulit-format B4 relay lens for 2/3" cameras! What does this do for you? Cameras like the Panasonic HPX500 use an industry standard B4 mount and interchangeable lenses. Currently there is no effective solution for 35mm adapter use, apart from using the B4 lens. Unlike the competition, our relay lens allows both 35mm SLR lenses (like our amazing Zeiss set) and cinema lenses to be used interchangeably with 100% field of view.  We've designed the system to provide 100% internal focusing with step-less aperture control. This means no physical breathing regardless of how you use or adjust the relay. The system incorporates exotic glass and a collection of engineered coatings to provide sharpness and contrast to rival even the finest cinema lenses. For more information, go to www.cinevate.com