20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
20mm F1.8 Full Frame Wide Angle
$599.00

20mm F1.8 Full Frame Wide Angle

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The Rokinon 20mm F1.8 ED AS UMC Lens 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 full-frame DSLR cameras, this 20mm f/1.8 lens can also be used on APS-C models where it will provide a 32mm 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.

User Manual Download

SPECIFICATIONS 1:1.8 20mm ED AS UMC
APERTURE RANGE F1.8 ~ 22
OPTICAL
CONSTRUCTION
13 ELEMENTS IN 12 GROUPS (2 ASPHERICAL)
MINIMUM
FOCUSING DISTANCE
0.2m (0.66ft)
FILTER SIZE Φ77.0mm
MAXIMUM DIAMETER Φ83.0mm
MOUNT Canon EF Nikon F with AE Pentax K Fujifilm X Sony E Micro 4/3
ANGLE OF VIEW Full Frame
94.8˚ 94.8˚ 94.8˚ - 94.8˚ -
ASP-C 66.9˚ 70.3˚ 70.3˚ 70.3˚ 70.3˚ -
FOUR-THIRDS
4/3”
- - - - - 56.1˚
LENGTH (mm) 88.4 85.9 86.9 114.7 114.4 113.2
WEIGHT (g) 497 488 493 565 525 520

Model: RK20M-C

UPC: 0-84438-76531-1

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.53oz (497g)

Length: 3.48" (88.4mm)

Model: RK20MAF-N

UPC: 0-84438-76530-4

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.21oz (488g)

Length: 3.38" (85.9mm)

Model: RK20M-P

UPC: 0-84438-76533-5

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.39oz (493g)

Length: 3.42" (86.9mm)

Model: RK20M-FX

UPC: 0-84438-76533-5

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 19.92oz (565g)

Length: 4.51" (114.7mm)

Model: RK20M-E

UPC: 0-84438-76532-8

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 18.51oz (525g)

Length: 4.50" (114.4mm)

Model: RK20M-MFT

UPC: 0-84438-76534-2

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 18.34oz (520g)

Length: 4.45" (113.2mm)

Specifications

SPECIFICATIONS 1:1.8 20mm ED AS UMC
APERTURE RANGE F1.8 ~ 22
OPTICAL
CONSTRUCTION
13 ELEMENTS IN 12 GROUPS (2 ASPHERICAL)
MINIMUM
FOCUSING DISTANCE
0.2m (0.66ft)
FILTER SIZE Φ77.0mm
MAXIMUM DIAMETER Φ83.0mm
MOUNT Canon EF Nikon F with AE Pentax K Fujifilm X Sony E Micro 4/3
ANGLE OF VIEW Full Frame
94.8˚ 94.8˚ 94.8˚ - 94.8˚ -
ASP-C 66.9˚ 70.3˚ 70.3˚ 70.3˚ 70.3˚ -
FOUR-THIRDS
4/3”
- - - - - 56.1˚
LENGTH (mm) 88.4 85.9 86.9 114.7 114.4 113.2
WEIGHT (g) 497 488 493 565 525 520

Canon EF

Model: RK20M-C

UPC: 0-84438-76531-1

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.53oz (497g)

Length: 3.48" (88.4mm)

Nikon F with AE

Model: RK20MAF-N

UPC: 0-84438-76530-4

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.21oz (488g)

Length: 3.38" (85.9mm)

Pentax K

Model: RK20M-P

UPC: 0-84438-76533-5

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 17.39oz (493g)

Length: 3.42" (86.9mm)

Fuji X

Model: RK20M-FX

UPC: 0-84438-76533-5

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 19.92oz (565g)

Length: 4.51" (114.7mm)

Sony E

Model: RK20M-E

UPC: 0-84438-76532-8

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 18.51oz (525g)

Length: 4.50" (114.4mm)

Micro 4/3

Model: RK20M-MFT

UPC: 0-84438-76534-2

Focal Length: 20mm

Maximum Aperture: F1.8

Coverage: Full Frame

Optical Construction: 13 Glass Element 12 Groups

Aperture Range: F1.8 to F22

Diaphragm Blades: 7

Coating: Ultra Multi-Coating

Minimum Focusing Distance: 0.66ft (0.2m)

Filter Size: 77mm Removeable Petal Shaped

Lens Hood: Removable Petal Shaped

Maximum Diameter: 3.27" (83mm)

Weight: 18.34oz (520g)

Length: 4.45" (113.2mm)