The Fotodiox Pro line of adapters is crafted in Fotodiox’s factory with excellence in mind. Our adapters are manufactured with precise tolerances, providing a solid, gap free, no wiggle connection for stress free use. No adjustments needed! Fotodiox adapters are meant to be taken off and put back on your camera as much as needed while remaining as precise as the day you bought them. Fotodiox Pro adapters feature all-metal, no plastic construction to create a secure connection between your glass and camera that will not degrade over time, keeping the lens-camera connection secure with every use. We use chrome plated brass mounts for enhanced durability and reliability. Lens Compatibility Note: Canon EOS EF and EF-S lenses require power in order to control aperture. When in use with our adapter your lens f-stop will be set to its widest value. Canon STM lenses are not compatible with our adapter. This adapter’s ideal use is with manual Canon EOS EF mount lenses and for double adapting. Compatible Nikon Z-mount Cameras (including but not limited to): Z7, Z6, Z50 Please Note: 'Focus-By-Wire' lenses such as Canon's STM requires power to engage the manual focus rings on the lens, since manual lens mount adapters do not power the lens, those lenses will not be able to focus. This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc. ) will be disrupted. We state “infinity focus allowed” because our adapters are designed to be universal which can prevent some lenses from focusing to infinity at the infinity mark. Set your camera to “Manual’ or ‘Aperture Priority’ for metering. If camera does not release be sure to enable ‘shoot without lens’ in camera settings. All pictures are for illustration purposes only. Actual product may vary slightly due to ongoing improvements in design.