Tamron SP AF 2x Pro Teleconverter for Canon Mount Lenses (Model 300FCA)
Simply fit a Tamron teleconverter between the lens and the camera body to increase a lens focal length, giving you extended telephoto capabilities so you can take photos with greater magnification from the same camera position. Tamron's AF teleconverters are compatible with most AF (autofocus) and autoexposure cameras.SP for "Super Performance"Tamron's SP-series lenses are designed to achieve top optical performance. Ground breaking design concepts give these lenses unsurpassed image quality and ease of use while setting new standards for future generations of lenses.