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Samsung EX-W20NB 20mm f/2.8 Lens

Light-sensitive "pancake" normal field-of-view lens for Samsung NX cameras

Item # 305EXW20NB

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Our take on the Samsung EX-W20NB 20mm f/2.8 Lens

You want one lens that will address your day-to-day shooting challenges, provide outstanding sharpness and clarity, and still make it possible to slip your Samsung NX Series camera in your windbreaker's pocket? The Samsung EX-W20NB should be your first choice. With a useful 30.8mm equivalent focal length and a light-gathering f/2.8 aperture, it's perfect for indoor shooting and candid snapshots. This lens features Samsung's intuitive i-Function button, which allows you to access manual camera adjustments with a simple twist of the lens. Adjust your shutter speed, aperture and more while previewing the changes in real-time.

Product Highlights:

  • 20mm f/2.8 "normal" field-of-view lens with 35mm equivalent of 30.8mm
  • compatible with Samsung NX Series digital cameras
  • ultra-compact "pancake" profile construction keeps Samsung NX cameras even slimmer and easier to carry
  • convenient i-function button gives instant access to manual settings with a twist of the lens
  • minimum focus distance: 6.7"
  • minimum aperture: f/22
  • seven circular-aperture diaphragm blades for smooth background defocusing
  • filter/attachment size: 40.5mm
  • lens is 2-1/2" in diameter and 1-1/4" long
  • weight: 2.57 oz.
  • warranty: 1 year
  • Our 60-day money-back guarantee
Supplied Accessories:
  • front and rear lens caps

What's in the Box:

  • 20mm F2.8 NX lens (black)
  • 43mm Lens cap (black)(installed)
  • Rear lens cap (installed)
  • Lens pouch
  • User Manual (11 languages)
  • After-Sales Service Guide

Hands-on research

Features and Specs

Brand Compatibility Samsung
Image Stabilization No
Focal Length 20mm
Maximum Aperture F2.8
Weight 2.57 ounces
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Samsung NX-mount: The Samsung 20mm F2.8 lens has the Samsung NX-mount. It is compatible with Samsung's NX-series of interchangeable lens cameras, including NX1000 and NX300.

Special i-Modes: The lens is compatible with special "i-modes" found in some NX-series camera. The Fn (Function) button found on the lens barrel activates the modes, which vary by camera model:

  • i-Depth: You can adjust the depth of field on the lens
  • i-Function: In P, A, S, or M modes, you can manually select and adjust shutter speed, aperture value, exposure value, ISO sensitivity, and White Balance on the lens
  • i-Zoom: You can zoom in on a subject with less degradation of the photo quality than the digital zoom.
  • i-Scene: You can select an appropriate scene mode and filter effect with the lens. Available modes and effects include Beauty Shot, Portrait, Children, Backlight, Landscape, Sunset, Dawn, Beach & Snow, and Night.


  • Focal Length: 20mm (35mm equivalent: 30.8mm)
  • Construction: 6 elements in 4 groups (including 1 aspheric element)
  • Angle of View: 70.2°
  • Aperture: F2.8 (Maximum), F22 (Minimum)
  • Maximum Magnification: 0.18x
  • Minimum Focus Distance: 6.69"
  • Filter Size: 43mm
  • Dimensions: Diameter=2.439", Length=1.203" (1.671" w/caps)
  • Weight: 2.57 ounces

Our Product Research Team

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