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Certified Keeper Sigma 20mm f/2 DG DN Contemporary
87 PixelMeter Score 16 reviews

Pros Pros
  • Compact and lightweight all-metal build
  • Sharp image quality with excellent contrast
  • Fast, quiet, and reliable autofocus
  • Manual aperture ring with tactile click stops
  • Strong resistance to flare and chromatic aberration
Cons Cons
  • Heavy barrel distortion and significant vignetting
  • Noticeable focus breathing during video capture
  • Lack of de-clickable aperture ring for video
  • Inconsistent autofocus performance for video tasks
  • Ergonomic issues with lens cap and hood usage

Launch price Launch price $699
Focal length & aperture Focal length & aperture 20mm f/2
Mount & coverage Mount & coverage Sony E, L-Mount · Full-Frame
Stabilization Stabilization None
Close focus Close focus 22 cm (0.15x)
Filter thread Filter thread 62mm
Autofocus motor Autofocus motor Stepper motor
Weight & size Weight & size 370g (13.1 oz) · 70 x 74.4 mm (2.76 x 2.93 in)

Announcement date Announcement date February 9, 2022
Launch MSRP Launch MSRP $699
Lens mount Lens mount Sony E, L-Mount
Image circle coverage Image circle coverage Full-Frame
Lens type Lens type Prime
Lens line / series Lens line / series Contemporary

Elements Elements 13
Groups Groups 11
Special elements Special elements 3 aspherical, 1 FLD, 3 SLD
Coatings Coatings Super Multi-Layer Coating
Front fluorine coating Front fluorine coating No

Focal length (wide) Focal length (wide) 20mm
Max aperture Max aperture f/2
Minimum aperture Minimum aperture f/22
Diaphragm blades Diaphragm blades 9

Diagonal angle of view Diagonal angle of view 94.5°

Autofocus motor Autofocus motor Stepper motor
Minimum focus distance Minimum focus distance 22 cm
Maximum magnification Maximum magnification 0.15x
Focus mechanism Focus mechanism Internal focus

Optical stabilization (OIS) Optical stabilization (OIS) No

Aperture ring Aperture ring Yes
AF/MF switch AF/MF switch Yes

Weight Weight 370g (13.1 oz)
Maximum diameter Maximum diameter 70mm (2.76 in)
Length Length 74.4mm (2.93 in)
Filter thread Filter thread 62mm
Weather sealing Weather sealing Mount gasket only
Barrel material Barrel material All-metal
Internal zoom Internal zoom No
Tripod collar Tripod collar Not supported

Lens hood Lens hood LH656-03 petal, included
Teleconverter compatibility Teleconverter compatibility Not supported