Lightdow 420-800mm f/8.3 Manual Zoom Telephoto Lens + T-Mount for Nikon D5500 D3300 D3200 D5300 D3400 D7200 D750 D3500 D7500 D500 D600 D610 D700 D800 D810 D850 D3100 D5100 D5200 D5600 D7000 D7100 Create Sharp High Quality Images, Comes with Lens Pouch and Protective Caps. Multi coated low-dispersion glass, anti-reflection coating, manual focus telephoto zoom lens to use with DSLR SLR cameras. 420-800mm f/8.3-16 Manual Telephoto Zoom Lens for 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. 1 * 420-800mm f/8.3-16 Manual Telephoto Zoom Lens with retail package 1 * T Mount for Canon or Nikon Filter diameter: 67mm elements in 2 Groups Aperture Range: 8.3-16 Focal length: 420-800mm Minimum Focusing Distance: 1.5m / 4.92ft Filter diamater: 67mm Package size: 27 * 9 * 9cm / 10.6 * 3.5 * 3.5in Package weight: 860g / 1.9LB