K&F Concept Lens Mount Adapter FD to NEX Copper Adapter Compatible with Canon FD FL Lens to NEX E-Mount Camera

Instructions for use
Attention:
Manual adapter without autofocus or aperture ring.
Skillful installation, needn't too much force.
'No Lens Attached' - Warning Message Appears:
If your camera indicates "lens is not properly installed", please modify the camera settings: 'Menu' -> 'Setup' -> 'Release w/o Lens' -> 'Enable' (Exact naming and location may change depending on camera model). If your lens does not have a manual aperture control ring, it will stop down to its smallest f/stop by default.
Set camera "release shutter without lens" to enable when using the adapter for the first time, or the camera will fail to recognize the lens and the shutter may not be released.
Features:
Lens: FD Mount Lens
Camera: NEX mount Cameras
Compact and high quality with metal material
Precise production to ensure the perfect fit
Diaphragm control of the lens is set manually
Allows focus infinity
Elegant clear appearance
Infinity focus position:
The position of the infinity mark [?] of the telephoto lens is shifted slightly to the positive side to enable focus adjustment even when focus shift is caused due to temperature changes. The shift range is denoted by an L-shaped line, Be sure to check the focus through the viewfinder even when you shoot at infinity.
Notes
Adapting APS-frame lens to full-frame camera, it may generate vignetting, some cameras could correct it by adjust APSC.
Adapting full-frame lens to APS-frame camera provides excellent edge-to-edge sharpness. The smaller image field helps minimize the effects of lens distortion and aberration by using the 'sweet spot' or center of the larger lens image circle. And it will magnify the focal length by 1.6 on Canon, 1.5 on Nikon and Sony, 2.0 on M4/3 camera.