1、COMPATIBILITY: Perfectly compatible with for D5, D4s, D4, D3x, Df, D810, D800, D750, D610, D500, D7500, D7200, D7100, D5600, D5500, D5300, D5200, D3400, and D3300 digital SLR cameras. 2、LARGE F2.8 APERTURE: Featuring a large F2.8 aperture, the large light throughput and increased shutter speed provide better performance in low light and nighttime scenes. The large aperture also better defocuses the foreground or background for a more artistic shooting effect. 3、OPTICAL DESIGN: Made of premium multi coated optical glass, the 9 circular aperture blades and 6 group, 6 element lens optical structure, which provides low image distortion, good image clarity and contrast. Minimum focusing distance is only 5 feet for excellent detail. 4、FOCUS SCALE AND FOCUS RING: Designed with a focus scale and smooth focus ring for easier operation. This lens is a telephoto lens, especially suitable for outdoor landscape or portrait photography. 5、MANUAL LENS: This lens is compatible with full frame and APS C frame cameras. This is a manual lens with no electronic contacts, and the camera cannot detect the lens after installation. Item Type: Fixed Focus Lens Material: Alloy, Optical Glass Weight: Approx. 517g / 18.2oz Focal Length: 135mm Fixed Focus Aperture: f2.8-f22 Frame: Full Frame Closest Focus Distance: 1.5m / 4.9ft Optical Structure: 6 Element, 6 Group Maximum Magnification: 0.11 Aperture Blades: 9 1 x Fixed Focus Lens 1 x Storage Bag 1 x Instruction Manual