While maintaining the integrity of your Canon Ef series lenses, the Viltrox Ef-FX2 0.71x Lens Mount Adapter seamlessly integrates them with Fuji X-mount mirrorless cameras, expanding your photographic possibilities. This innovative adapter modifies the focal length by a factor of 0.71 based on the original lens (equivalent focal length = focal length x 0.71), effectively increasing the aperture by one level. This feature, coupled with the high-quality, 4-group, 4-piece optical glass construction, ensures sharper, brighter, and more detailed images.The Viltrox Ef-FX2 Lens Mount Adapter is not just a durable and versatile tool, but also a user-friendly one. It supports Exif signal transmission, enabling your camera to record vital lens data for better image processing. Additionally, it facilitates autofocus (Af) and adjustable aperture, enhancing your control over the photographic output.