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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

  • Product typeUltra Wide Angle
  • Compatible withMirrorless Camera
  • Product 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.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $784.99
Pricier than about 68% of the 2,570 comparable items (median $546.49).

Specifications

Product
Brand nameSONY
Product typeUltra Wide Angle
Product colorBlack
Compatibility
Compatible withMirrorless Camera

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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