Lightdow 85mm F/1.8 Medium Telephoto Portrait Prime Manual Focus Full Frame Lens for Nikon D850, D810, D800, D750, D700, D610, D300, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600 etc - 8 pieces of circular aperture, smooth and large focus rings internal focusing(IF) - hybrid aspherical lenses (H-ASP), ultra multi coating(UMC) - Compatible with Nikon D850, D810, D800, D750, D700, D610, D300, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90, Df, D3, D3X etc. - Backed with Lightow's 12-Month Return for Refurbish/Replacement Manufacture Warranty. NOTE: This is a manual lens, NO Electronic Contacts, your camera will not detect the lens when mounted, that's why it shows not connecting properly, please switch to MF MODE in order to use this lens correctly. Tips to use our Manual Lens: 1) Set the mode dial to Manual (M). 2) Set the Release w/o Lens option in the camera menu to Enable. 3) Set the Shutter lock option in the camera menu to Off: no lens. Lens type: Prime lens Max Format size: Full Frame Focal length: 85 mm Image stabilization: No Lens mount: Canon, Nikon Maximum aperture:F1.8 Minimum aperture: F22 Aperture ring: Yes Elements: 9 Groups: 7 Special elements / coatings: 1 aspherical element Minimum focus: 0.85 m (33.46) Autofocus: No Full time manual: Yes Distance scale: Yes DoF scale: No Weight: 430 g (1.16 lb) Diameter: 77 mm (3.03) Length: 110 mm (4.33) Filter notes: 72mm Hood supplied: Yes Package Size: 4.09 x 4.88 x 7.12 inches