Specifications:

• Focal length/Aperture: 135mm f/2.8
• Lens construction: 5 elements in 4 groups
• Picture angle: 18°
• Diaphragm: Automatic
• Maximum Reproduction ratio: 1:7.5
• Aperture scale: f/2.8- f/32 on both standard and aperture-direct-readout scales
• Exposure measurement: Via full aperture method with Ai cameras; via stop-down method with non-Ai cameras.
• Distance scale: Graduated in meters and feet from from 1.3m (4.5 ft.) to infinity (oo)
• Weight: 435g
• Dimensions: 64mm dia. x 91.5mm long (overall); 83.5mm extension from lens flange
• Filters: 52mm front screw-in
• Front lens cap: Snap-On
• Lens hood: Built-in telescopic type
• Lens case: CL-32S hard leatherette, No.62 soft pouch, or CP-9 plastic

Deriving from the tried and tested optical design from the 105mm f2.5AIS, the 135mm is inherits all the excellent characteristics as the former, albeit losing just 1/3 stop. It's sharp even wide open, and at f4.0 onwards, it rates among the sharpest telephoto Nikon primes!