Sony SAL-20F28 20mm f/2.8 AF Lens for Alpha & Minolta Maxxum Series

Model #SAL20F28

USA Version
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Dimensions (dxl) Approx. 2.11 x 3.07" (5.35 x 7.80 cm)
Weight 10.05 oz (285 g)
Filter thread Front: 72 mm


Groups/elements 9/10
Angle of view 94°
APS-C Picture Angle: 70°
Aperture Maximum: f/2.8
Minimum: f/22
Focal length 20 mm
Comparable APS-C Focal Length: 30 mm
Format compatibility 35mm Film / Full-Frame Digital Sensor
DSLR (APS-C Sensor)
Minimum focus distance 9.84" (24.99 cm)
Maximum reproduction ratio 1:7.69
Magnification 0.13x
Camera mount type Sony Alpha, Minolta AF
Diaphragm blades 7


Image stabilization No
Autofocus Yes
Tripod collar No
User Reviews
5 June 2017

I was disappointed with this lens. The sharpness, clarity and contrast are nowhere near as good as the Sony 16-35mm zoom lens. The only reason to buy a prime lens is to get better image quality than you can from a zoom.

20 March 2013

I purchased this lens for my a99 body for the purpose of capturing indoor photography of subjects (head to toe). I found my 50mm f1.4 and a CZ 85mm f1.4 lenses are both great in low light, but I find myself really constrained when trying to distance myself from my subject (especially in a 10x10...

  • +

    Corner Detail, DOF

  • -

    F2.8 not adequate for indoor shoots, AF

B h photo.34921152
27 April 2010

I bought a Sony A850 body and needed some lenses and this (20mm F2.8 Sony) was the first one. I have had the Nikon and Canon counterparts. This is the best of the three for sure. They all seem to have some things in common.

17 December 2017

I have a Minolta badged version of this lens and have used it extensively for landscape photography, time-lapse and also night photography. It takes filters, has a good just feels like a 'proper' old school lens - really like it. A robust lens.

  • +

    Consistent Output, Rugged, Sharp Focus, Strong Construction

  • -

    Slow Focus

2 March 2017

not as wide angle as expected. returned for that reason.

B h photo.34921152
16 February 2015

Plan to use this during decent into magma chamber in Iceland

2 June 2014

great lens. i use it for northern lights photography and it works really well for capturing landscape.

2 June 2014

The Sony 20 mm F/2.8 makes a very good and relatively low cost super-wide angle lens. For most people, it's wide enough and fast enough. I would definitely recommend this lens.

2 June 2014

This lens is identically the same as the which is a great lens. They are useable at f2.8, sharper at f4, and being wonderful at f5.6-f11. For sharper image with this lens, you may use the "front focus trick" If you have full frame A-mount camera, this lens is a must lens.

2 June 2014

Went I buy a prime lens (and I like them very much and have dozens of it), you expect to exchange the flexibility of a zoom for the sharpness and lack on aberrations of this type of lens. This is not the case of this lens.

Product Highlights
  • Aperture Range: f/2.8-22
  • For Alpha & Minolta Maxxum DSLRs
  • Minimum Focus Distance: 9.8"
  • 7x Circular Aperture Blades
  • Rear Focusing System
  • Filter Diameter: 72mm
In The Box
  • Sony 20mm f/2.8 Wide Angle Prime Lens
  • Front Lens Cap
  • Rear Lens Cap
  • ALC-SH0013 Lens Hood for 20mm f/2.8 Lens
  • Limited 1-Year Warranty
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