Rokinon 20mm f/1.8 ED AS UMC Lens for Canon EF

Model #RK20M-C

Rokinon Warranty - USA Version
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Specifications

Physical

Dimensions (DxL) Approx. 3.27 x 3.48" (83.0 x 88.4 mm)
Filter Thread Front: 77 mm
Weight 1.09 lb (497 g)

Performance

Focal Length 20mm
Format Compatibility 35mm Film / Full-Frame Digital Sensor
Camera Mount Type Canon EF
Aperture Maximum: f/1.8Minimum: f/22
Diaphragm Blades 7, Rounded
Elements/Groups 13 / 12
Minimum Focus Distance 7.87" (20 cm)
Angle of View 94.8°

Packaging Info

Package Weight 1.75 lb
Box Dimensions (LxWxH) 7.1 x 5.3 x 5.1"

Features

Autofocus No
User Reviews
B h photo.34921152
24 January 2017
10/10

When I switched from Nikon to Pentax, I knew the one focal length I would have trouble covering is wide angle... Pentax simply doesn't have any full frame wides. The only viable option is the Pentax 15-30mm which is an exceptional lens, but it's expensive and doesn't take filters.

B h photo.34921152
8 January 2019
8.0/10

Tested on A7III.Decently sharp at the center, just a bit softer moving to the corners, and heavy vignetting at F1.8. At F2.8, center is razor sharp, extreme corners remain similarly soft to 1.8, and vignetting is much improved.

B h photo.34921152
10 September 2018
10/10

I purchased this lens specifically for taking pictures of the stars. Traveling to Maui and during the prime Milky Way viewing season. The performed excellent and I would highly recommend this lens!

B h photo.34921152
15 February 2018
8.0/10

Was searching for a high quality (Zeiss, Sigma Art) Prime Wide Angle (18-21mm) for Pentax K-1 with no luck. After reading good reviews, settled for Rokinon 20mm F1.8 (K-1 shows 1.7). Lens is well made, light weight and compact.

B h photo.34921152
19 August 2018
10/10

I bought this lens for wide field astrophotography. I finally tested it with some Milky Way shots this week. The lens is great. There were comments that the lens suffers at 1.8 and 2.0 so I shot at 2.8. I intend to test the more open apertures later.

B h photo.34921152
19 September 2018
8.0/10

When I first received this lens, I immediately checked for any optical de-centering, which seems to be a prevalent problem in other Rokinon/Samyang lenses. I was unable to detect any problem. I then compared it to my Canon 17-40mm f/4 zoom at 20mm. At wide open (f/1.8 vs.

B h photo.34921152
5 September 2018
10/10

Summary: This lens has good build quality and my copy has even performance across the frame. Sharpness is excellent in the center but falls off towards the edges, those with an A7r may want to look elsewhere. The lens is good for astro at about f/2.8 and makes a good all-around landscape lens.

B h photo.34921152
29 March 2018
4.0/10

I shoot with a Sony A7R2. There's no live view with this lens. And there's a hair margin wherein to establish focus on stars. Moreover "focus tracking" on the A7R2 only sort of works with stars.

Amazon.32817384
12 March 2018
10/10

I’ve recently upgraded from the a6000 + Samyang 12mm to an a7ii + this Rokinon 20mm (I shoot mostly landscape but initially got into shooting because of my interest in astrophotography - thanks lonelyspeck!!!

B h photo.34921152
20 June 2017
8.0/10

Good lens for the cost.

Product Highlights
  • EF-Mount Lens/Full-Frame Format
  • Aperture Range: f/1.8 to f/22
  • Two Aspherical and Three ED Elements
  • Ultra Multi-Coating
  • Manual Focus Design
  • Rounded Seven-Blade Diaphragm
In The Box
  • Rokinon 20mm f/1.8 ED AS UMC Lens for Canon EF
  • Front and Rear Lens Caps
  • Limited 1-Year Warranty
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