Nikon AF 135mm F2D DC Lens

Finished in Nikon's black crinkle coating, it also has a built-in telescoping lenshood and a generously broad manualfocusing ring that's both rubberized and knurled. The MF/AF switch is a rotating, lockable collar. AF action is extremely fast and quiet.  This lens offers a lockable frontbarrel DC aperture ring. 

It has two opposing scales (both f/2 through f/5.6), one for adjusting foreground defocus (the F scale), the other for background defocus (R, for Rear). For Defocus Control to work, you must select the appropriate DC scale (F or R), and its aperture must match the shooting aperture. If there's a discrepancy between the two, overall softness results. 

The wider the deviation, the softer the image will become. The maximum magnification ratio came in at 1:6.71 at the close-focusing distance of 42 inches -- just about the perfect distance for a portrait lens. It lets the photographer get close enough for normal conversation when making headshots.