Rokinon 20mm f/1.8 ED AS UMC Lens for Pentax K

BH #RO2018PK • MFR #RK20M-P
Rokinon
Rokinon 20mm f/1.8 ED AS UMC Lens for Pentax K
Key Features
  • K-Mount Lens/Full-Frame Format
  • Aperture Range: f/1.8 to f/22
  • Two Aspherical and Three ED Elements
  • Ultra Multi-Coating
Designed for Pentax K-mount DSLRs, this 20mm f/1.8 ED AS UMC Lens from Rokinon 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.
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Lens Mount
Canon EF
Nikon F
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Rokinon 20mm f/1.8 Overview

Designed for Pentax K-mount DSLRs, this 20mm f/1.8 ED AS UMC Lens from Rokinon 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 Pentax K-mount DSLR cameras, this 20mm f/1.8 lens can also be used on APS-C models where it will provide a 30mm 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.

Rokinon 20mm f/1.8 Specs

Focal Length20mm
Maximum Aperturef/1.8
Minimum Aperturef/22
Lens MountPentax K
Format CompatibilityFull-Frame
Angle of View94.8°
Minimum Focus Distance7.87" / 20 cm
Optical Design13 Elements in 12 Groups
Diaphragm Blades7, Rounded
Focus TypeManual Focus
Image StabilizationNone
Filter Size77 mm (Front)
Dimensions (ø x L)3.27 x 3.42" / 83 x 86.9 mm
Weight1.08 lb / 493 g
Packaging Info
Package Weight1.665 lb
Box Dimensions (LxWxH)7.1 x 5.25 x 5.15"
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