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Nikon 20051
AF-S NIKKOR 20mm f/1.8G ED Lens

OUR PART #:  20051

The Nikon AF-S NIKKOR 20mm f/1.8G ED is a compact, lightweight FX-format lens that combines the ultra-wide perspective of a 20mm focal length...
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The Nikon AF-S NIKKOR 20mm f/1.8G ED is a compact, lightweight FX-format lens that combines the ultra-wide perspective of a 20mm focal length, the low-light capabilities and shallow depth of field of an f/1.8 maximum aperture, and the superior optical characteristics of an advanced NIKKOR prime lens.

The AF-S NIKKOR 20mm f/1.8G ED delivers a 20mm, 94° angle of view  (30mm, 70° equivalent on DX-format cameras) that's ideal for stills or motion capture. With its 7.8" close focus capability, you can work in tight spaces or get close to your subject to accentuate your focal point. From a distance, the AF-S NIKKOR 20mm f/1.8G ED lets you get wide, expansive vistas into the frame. Videographers will love using their Nikon D-SLR and this compact, lightweight lens for establishing shots, first-person point-of-view sequences and B-Roll footage.

At its maximum aperture setting of f/1.8, the AF-S NIKKOR 20mm f/1.8G ED produces beautifully blurred backgrounds in your photos and HD videos and lets you shoot at lower ISO settings to retain high image quality. In low-light situations, opening the aperture to f/1.8 will also increase shutter speed to prevent camera shake and motion blur.

The AF-S NIKKOR 20mm f/1.8G ED is designed to draw peak performance from high-resolution Nikon D-SLRs in both still and HD video applications. Aspherical (AS) lens elements and Extra-low Dispersion (ED) glass elements with Nano Crystal Coat (N) combat sagittal flare and chromatic aberration for superb, sharp rendering across the entire frame. Nikon's Silent Wave Motor (SWM) uses ultrasonic waves for fast, accurate near quiet autofocusing as close as 7.8" (0.2 meters) from your subject.

AS stands for Aspherical lens elements. This type of lens utilizes non-spherical surfaces on either one or both sides of the glass in order to eliminate certain types of lens aberration.

ED (Extra-Low Disepersion) Glass - An optical glass developed by Nikon that is used with normal optical glass in telephoto lenses to obtain optimum correction of chromatic aberrations.

IF Lens -A NIKKOR lens in which only the internal lens group shifts during focusing. Thus, IF NIKKORS do not change in size during AF operation, allowing for compact, lightweight lenses capable of closer focusing distances. These lenses will be designated with the abbreviation IF on the lens barrel.

Nano Crystal Coat - An anti-reflective coating developed by Nikon that virtually eliminates internal lens element reflections across a wide range of wavelengths. Nano Crystal Coat solves ghost effects caused by red light and effectively reduces ghost and flare caused by light entering the lens diagonally.

Rear Focusing System - A system in which only the rear lens group moves during focusing, thus eliminating changes in the physical length of the lens during focusing and enabling faster focusing. Such lenses are designated with RF on the lens barrel.

AF-S NIKKOR lenses feature Nikon's Silent Wave Motor (SWM) , which represents a significant advance in AF lens technology. SWM uses ultrasonic vibrations—rather than a gear system—to focus the lens, providing incredibly smooth, silent and precise autofocus operation.

Nikon AF-S NIKKOR 20mm f/1.8G ED Lens Specifications:

  • Mount Type: Nikon F-Bayonet
  • Focal Length: 20mm
  • Maximum Aperture: f/1.8
  • Minimum Aperture: f/16
  • Format: FX/35mm
  • Maximum Angle of View (DX-format): 70°
  • Maximum Angle of View (FX-format): 94°
  • Maximum Reproduction Ratio: 0.23x
  • Lens Elements: 13
  • Lens Groups: 11
  • Compatible Format(s): FX, DX
  • Diaphragm Blades: 7
  • Distance Information: Yes
  • Nano Crystal Coat: Yes
  • ED Glass Elements: 2
  • Aspherical Elements: 2
  • Super Integrated Coating: Yes
  • Autofocus: Yes
  • AF-S (Silent Wave Motor): Yes
  • Internal Focusing: Yes
  • Minimum Focus Distance: 0.66 ft. (0.2m)
  • Focus Mode: Auto, Manual
  • Rear Focusing: Yes
  • G-type: Yes
  • Filter Size: 77mm
  • Accepts Filter Type: Screw-on
  • Approx. Dimensions: 3.2" Dia. x 3.1" L (82.5 x 80.5 mm)
    Based on CIPA Guidelines
  • Approx. Weight: 12.6 oz. (355 g)
    Based on CIPA Guidelines

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