Let the Speed Booster Ultra 0.71x Adapter unlock the full potential of your Canon full-frame EF-mount lenses when paired with Micro Four Thirds-mount cameras. This high-quality, innovative adapter is designed to enhance your photography by increasing the maximum aperture by 1 stop, thus allowing for faster shutter speeds and superior performance in low-light conditions. The adapter's 0.71x magnification factor effectively reduces the crop factor of Micro Four Thirds cameras from 2.0x to 1.4x, expanding your field of view and enabling a more comprehensive capture of your subject.Crafted with a patented 5-element/4-group optical design that incorporates ultra-high index tantalum-based optical glass by Caldwell Photographic in the USA, the Speed Booster Ultra ensures exceptional image quality. The optical prowess of this adapter not only maintains but improves the MTF (Modulation Transfer Function) of any attached lens, promising sharp, clear images even when utilizing top-tier lenses like the Zeiss Otus series.On the electronic side, this durable and compact adapter boasts seamless integration with Panasonic Micro Four Thirds cameras, providing autofocus capabilities that are both accurate and reliable. The adapter can be powered by the camera body or an external 5V power source (not included), and it supports electronic manual focusing for select lenses. Additionally, it offers image stabilization support and transmits EXIF data such as focal length and aperture to the camera, ensuring a versatile and user-friendly experience.The Speed Booster Ultra is also equipped with a detachable tripod foot compatible with Arca Swiss, Markins, and Photo Clam ball heads, and it features a flocking material coating to minimize internal reflections. While it is optimized for Micro Four Thirds sensors, it is important to note that certain limitations apply, such as the need for modification of EF-S lenses and the lack of autofocus support for JVC and Olympus cameras.Choose the Speed Booster Ultra 0.71x Adapter for its compatibility with a wide range of Canon EF lenses and its ability to deliver a narrower depth of field and wider perspective. This adapter is the perfect tool for photographers and videographers looking to leverage the quality of their full-frame lenses on Micro Four Thirds camera bodies. Whether you're shooting stills or video, the Speed Booster Ultra is engineered to enhance performance without compromising the integrity of your master lens..