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Black cylindrical ultra-wide prime lens with matte finish and silver accents

Sony

Sony FE 20mm f/1.8 G ultra-wide prime camera lens

SKU CH-Q944-KSXWM

Compact ultra-wide prime for full-frame mirrorless cameras, delivering fast f/1.8 aperture and advanced optics for sharp, low-light performance

  • TypeUltra Wide Angle
  • CompatibilityMirrorless Camera
  • ColorBlack
  • Ultra-wide 20mm view captures expansive architecture and landscapes
  • Bright f/1.8 aperture enables low-light shooting and shallow depth of field
  • Two Advanced Aspherical elements reduce distortion and spherical aberrations for high sharpness
  • Three Extra-low Dispersion elements minimize color fringing and chromatic aberrations
  • Dual XD Linear Motors deliver fast, precise, and quiet autofocus performance

Compact ultra-wide prime for full-frame E-mount

The Sony FE 20mm f/1.8 G is a compact ultra-wide prime lens built for full-frame E-mount mirrorless cameras. It delivers a 20mm focal length with a fast f/1.8 maximum aperture for low-light work and shallow depth of field. Advanced optical elements ensure high resolution across the frame.

Suited for landscape, architecture

This lens suits photographers who need a wide field of view in a lightweight, dust and moisture resistant body for everyday carry. It is not for buyers who need zoom flexibility or a longer focal length for distant subjects. Video users seeking smooth focus transitions benefit from the quiet linear motors.

The 20mm f/1.8 specification defines the use case

The fixed 20mm focal length combined with the bright f/1.8 aperture decides whether this lens fits your kit. It determines the ultra-wide perspective and low-light capability in a single optic. If your shooting requires a different angle of view or variable focal lengths, this prime will not cover those needs.

Highlights

  • Ultra-wide 20mm view captures expansive architecture and landscapes
  • Bright f/1.8 aperture enables low-light shooting and shallow depth of field
  • Two Advanced Aspherical elements reduce distortion and spherical aberrations for high sharpness
  • Three Extra-low Dispersion elements minimize color fringing and chromatic aberrations
  • Dual XD Linear Motors deliver fast, precise, and quiet autofocus performance

Specifications

TypeUltra Wide Angle
CompatibilityMirrorless Camera
ColorBlack
BrandSONY

Questions about this item

Does the f/1.8 aperture keep the Sony FE 20mm G lens running cool during long shoots?

The lens has no active cooling; its all-metal barrel passively dissipates heat from the optical group, and the f/1.8 aperture does not generate measurable thermal load during continuous use.

Which camera body mount is required for the Sony FE 20mm f/1.8 G to function?

The lens uses the Sony E-mount and covers the full-frame image circle, so it works on any E-mount mirrorless body — APS-C or full-frame — without an adapter.

Will the Sony FE 20mm f/1.8 G autofocus correctly on a first-generation A7 body?

The two XD Linear Motors communicate through the standard E-mount protocol, so autofocus operates on all E-mount bodies including the original A7, though speed may vary with the camera's processor.

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