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The Vello Lens Mount Adapter - Canon FD Lens to Canon EOS Camera allows you to mount a Canon FD lens to a Canon EOS camera body. Besides for making financial sense, this allows you to use your favorite lens across different camera platforms. The lens adapter is designed to fit securely to the lens, yet can still be removed easily when not needed.
This lens adapter acts as a mount adapter and an optical adapter. It features optical-quality glass elements to achieve this. The adapter increases the focal length by 1.25x and reduces the lens aperture by 1 f/stop.
Note: Although the lens will fit physically, autofocus, automatic diaphragm (AE metering), and other functions dependent on communication between camera body and lens will be disrupted by the lens adapter. You will need to focus manually, and to set exposures manually or meter in aperture priority (stop-down) mode. If the lens does not have a manual aperture collar, the aperture will be stopped down to its smallest f/stop. Focusing to infinity is retained.