Samyang 20mm F1.8 ED AS UMC Lens

Samyang 20mm F1.8 ED AS UMC Lens
Regular price 2,578.00


Designed for mirrorless cameras, this 20mm f/1.8 ED AS UMC Lens from Samyang is a bright wide-angle prime featuring an intuitive manual focus design and enhanced optical construction. Two aspherical elements and three extra-low dispersion elements are used to reduce both spherical and chromatic aberrations for greater sharpness, clarity, and reduced distortion. The optics also feature an Ultra Multi-Coating to guard against lens flare and ghosting for increased contrast and color neutrality when working in strong lighting conditions. The manual focus operation affords working with subjects as close as 7.9" away, and a rounded seven-blade diaphragm contributes to a pleasing bokeh quality.

  • A wide-angle prime designed for Micro Four Thirds mirrorless cameras, this 20mm f/1.8 lens provides a 40mm equivalent focal length.
  • Bright f/1.8 maximum aperture benefits working in low-light conditions and also affords greater control over depth of field for selective focus control.
  • Two aspherical elements are used to reduce spherical aberrations for increased sharpness and minimized distortion.
  • Three extra-low dispersion elements help to control chromatic aberrations and color fringing for improved clarity and color fidelity.
  • An Ultra Multi-Coating has been applied to individual elements in order to reduce flare and ghosting for increased contrast and a neutral color balance.
  • Manual focus operation allows for precise control with a minimum focusing distance of 7.9".
  • Rounded seven-blade diaphragm contributes to a smooth and pleasing bokeh quality.
Technical Specs

Focal Length

20mm (35mm Equivalent Focal Length: 40mm)

Maximum Aperture


Minimum Aperture


Lens Mount

 Sony A/Sony E/Canon EF/Canon M

Micro Four Thirds/Fujifilm X/Nikon AE

Format Compatibility

Full Frame/APS-C/Micro Four Thirds

Angle of View

Super35: 70.3°

Full Frame: 94.8°


Minimum Focus Distance

7.87" / 20 cm

Optical Design

13 Elements in 12 Groups

Diaphragm Blades

7, Rounded

Focus Type

Manual Focus

Image Stabilization


Filter Size

77 mm (Front)

Dimensions (ø x L)

3.3 x 4.5" / 83.0 x 113.2 mm


1.1 lb / 520 g