• Webcode: 413472 • Mfr: TOK-FIR20S
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Product Highlights
  • f/2.0 - f/22 Aperture Range
  • 13/11 (Elements/Groups)
  • Full-Frame Format
  • A Mount
Web Availability: Special Order


Fírin is a variation of Fírinne, the Old Irish word for “truth,” which was coined during the Gaelic Revival in the late 19th Century. It means, "that which is real". It signifies "being true to someone or something". And it represents a promise from Tokina to photographers to help them capture the truth in their images with this revolutionary new lens. With FíRIN, photographers can shoot with confidence, knowing that every image captured with their mirrorless cameras will be its own moment of truth.

Key Features:

  • Made for the Sony a7 Series
  • Aspherical lens elements to reduce any type of aberration
  • Transmits aperture, distance and optical information to the camera .
  • Includes a wide manual focus ring, aperture ring and depth of field index bar.
  • Luxurious use of high-precision Japanese-made metal parts and mechanisms.
  • Compatible with full-frame E-mount Sony mirrorless cameras.


By adopting two all-glass precision molded aspherical elements and 3 Super-low Dispersion (SD) glass lens elements we succeeded in greatly reducing aberrations yielding images higher resolution and contrast. This optical design demonstrates Tokina’s decades of experience and traditions of excellence as an optics manufacturer merged with the application of new technologies.


Anti-reflective coatings play an important role in the optical performance of the lens. In addition to the fact that all glass elements of the FíRIN 20mm f/2 are multi-coated, considerable work has been done with the rear convex surfaces of the large G1 element. This element was very difficult to coat due to its complex shape. The Coatings are even on the contacting surfaces of the element combinations G6- G7 and G10-G11. All these small measures add up to reduce reflections and flare to an absolute minimum while increasing sharpness and contrast.


Tokina Fi´RIN 20mm f/2 FE MFBeing a fully manual lens with a large focus ring, aperture ring and depth of field index bar, the ability to simultaneously transfer distance and aperture status to the camera give you full advantage to use the latest features of the α7 series such as 5-axis image stabilization, MF assist and the electronic distance scale. You can get the advantage of both strengths: excellent optical properties of the lens and outstanding camera image processing power.

Exterior & Usability

Carefully crafted high quality finishes and precisely engineered and manufactured metal parts give this lens the feel and performance of a premium optic. Attention to detail, finely machined and finished component, superb optical design and balanced ergonomics yield a lens that is as easy to use and good looking as the images it creates. Manual focus allows prefocus technique snapshots to be taken with easy using the advantage of the deep depth of field of this super-wide angle lens or open up to f/2 to enjoy beautiful bokeh.

For Cinematography

FíRIN is not only for photography. With a press of the De-Click button on the aperture ring the lens declicks the aperture mechanism making it suitable for cinema/video use.

What's Included

Front Lens Cap
Instructions Manual
Lens Hood
Rear Lens 


Product Specifications

Tokina FiRIN f/2.0 FE Manual Focus Lens for Sony a7 Series

Mount Sony E
Type Wide Prime
Focal Length 20mm
Maximum Aperture f/2
Minimum Aperture f/22
Manual Aperture Ring Yes
Aperture De-Click Yes
Angle of View 92°40' 
Minimum Focusing Distance 0.28m
Macro Ratio 1:10, 29
Focusing Type Yes
Sensor Size Full Frame
Filter Size 62mm
Multi-coating Yes
Construction Type Glass
Construction E/G 13 elements in 11 groups
Aperture Blades 9
Electrical Contacts Yes
Dimensions 69x82mm
Weight 490g

Questions & Answers

Tokina FiRIN 20mm f/2.0 FE Manual Focus Lens for Sony A7 Series

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