PRODUCT

20mm T1.9 ED AS UMC

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Explore Your Wideness

Samyang 20mm T1.9 ED AS UMC is a wide angle manual focus cine lenses for DSLR cameras with full frame sensor size. The flow of light is devised based on the uniqueness of the distance from glass to sensor in mirrorless cameras to create optimal performance. 

The bright T1.9 aperture secures a fast shutter speed even under the restricted lighting conditions to offer best quality images. It will brighten up your everyday snapshots. Also it creates an outstanding out-of-focus look by highlighting the main object effectively. In between ultra-wide 16mm and wide-standard 24mm, 20mm lens is a perfect fit to explore wide angles not only for shooting indoor images such as concerts and interior photos but also street snaps. The 0.2m of minimum focusing adds versatility to the lens. 

Based on Samyang Optics’ exceptional optical technology, Ultra Multi Coating and two aspherical lenses and three extra-low dispersion have been included among 13 glasses in 12 groups to minimise aberration and unnecessary light dispersion, delivering high resolution from the centre to the corners of the image. 

Specifically, the Samyang 20mm T1.9 ED AS UMC is a cine lens optimally designed for professional follow focus system, thanks to the quiet and smooth de-clicked focus and aperture gear rings. Also, the distance scale and T numbers are marked on both sides of the lens for convenience when filming. 

Samyang 20mm T1.9 is compatible with 10 camera mounts: Canon EF, Nikon F, Pentax K, Sony A, Canon M, Fujifilm X, Samsung NX. Sony E, MFT.
※ Size and design may vary depending on the mount of a lens

Technical Information
  • Specifications
    Specifications 20mm T1.9 ED AS UMC
    Aperture Range T1.9 ~ 22
    Optical
    Construction
    13 ELEMENTS IN 12 GROUPS
    (2ASPHERICAL LENS)
    Minimum
    Focusing Distance
    0.2m (0.65ft)
    Filter Size 77.0mm
    Maximum Diameter 83.0mm
    Mount NIKON
    F
    CANON
    EF
    PENTAX
    K
    SONY
    A
    CANON
    M
    FUJIFILM
    X
    SAMSUNG
    NX
    SONY
    E
    MICRO
    FOUR
    -THIRDS
    Angle Of View 35mm 94.8˚ 94.8˚ 94.8˚ 94.8˚ - - - 94.8˚ -
    APS-C 66.9˚ 70.3˚ 70.3˚ 70.3˚ 66.9˚ 70.3˚ 70.3˚ 70.3˚ -
    FOUR-THIRDS
    4/3”
    - - ------56.1˚
    Length(mm)85.9mm88.4mm86.9mm87.9mm114.3mm114.7mm106.9mm114.4mm113.2mm
    Weight(g) 508g 518g 513g 518g 546g 586g 536g 546g 541g
    Gear Module0.8mm
    A7mm
    B4mm
    C43.8mm
    D 8mm 10.5mm 9mm 10mm 36.4mm 36.8mm 29mm 36.5mm 35.3mm
    Focus Ring Diameter 81.6mm
    Aperture Ring Diameter 70.4mm 73.6mm

  • MTF CHART 







  • Optical Construction 

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Samyang’s Guide to Achieving the Optimal Angle of View

The perfect spacing and distance are always necessary when shooting all kinds of subjects, including people, to give them a proper relationship with the beautiful space around them. So, what’s the exact distance that helps you best appreciate a work of art, or a photo?

The correct answer is the diagonal length of the full frame of a subject.

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표준화각 자료 이미지

The best standpoint from which to appreciate the full view of a subject is the distance of the diagonal length of the subject frame. This wider angle is superior to standing closer at a 50 degree angle to get a more detailed view. This notion of an ideal distance or view point is also applicable in the world of photography.

For still images, keeping a distance equal to the diagonal length of the full image surface is recommended. The full frame sensor of a digital camera is 36 x 24mm and the diagonal length is 43.26mm so any distance close to this number is nearer to the ideal than the currently accepted industry standard of 50mm.

Back when film cameras were common, 45mm was the industry standard and this continued as reflex cameras needed extra space to fit a mirror. However, as mirrorless cameras become more popular again, there has been a need to return to this industry standard…which is the impetus for the Samyang AF 45mm F1.8 FE. With less distortion than a 35mm lens and wider angles than a 55mm lens, the Samyang AF 45mm F1.8 FE is a perfect lens for portraits, landscapes, architecture photography, and pictures of pets.

What is Preset Aperture Control Function?

On the Preset Aperture Control function, the aperture blade operates smoothly like a "De-clicked lens", which is advantageous for video recording.
Fujifilm cameras are engineered to control the aperture according to the minimum exposure value(F-stop), so when the camera controls the aperture, it blinks momentarily to set the proper exposure.

AF 75mm F1.8 X intentionally disconnects the communication with the camera body and the lens itself on the Preset Aperture Control function, so it is possible to smoothly adjust the exposure without flickering. ISO and shutter speed are adjusted according to the changed exposure by controlling the aperture, so the exposure value can be changed even with the 1/2 F-stop.

What is Preset Aperture Control Function?

On the Preset Aperture Control function, the aperture blade operates smoothly like a "De-clicked lens", which is advantageous for video recording.
Fujifilm cameras are engineered to control the aperture according to the minimum exposure value(F-stop), so when the camera controls the aperture, it blinks momentarily to set the proper exposure.

AF 75mm F1.8 X intentionally disconnects the communication with the camera body and the lens itself on the Preset Aperture Control function, so it is possible to smoothly adjust the exposure without flickering. ISO and shutter speed are adjusted according to the changed exposure by controlling the aperture, so the exposure value can be changed even with the 1/2 F-stop.

What is Recommended Settings for Preset Aperture Control Function?

The Preset Aperture Control function operates only when shooting video(Movie mode) and the focusing mode of the camera is set to AF mode. Please set the aperture at f/1.8 before switching the "Custom Switch" to "Mode 2. It is recommended to set the "Exposure mode" as A mode (Aperture Priority AE) or M mode (Manual Exposure).

* How to use the “Preset Aperture Control” function?

1) Camera Body Setting
      AF Mode → Video Mode ('A' or 'M' mode) → Set the Aperture @F1.8
(2) Lens Setting
      Switch your "Custom Switch” to “Mode 2(M2)"
(3) Now, you're ready to use the Preset Aperture Control function with your focus ring

What is Recommended Settings for Preset Aperture Control Function?

The Preset Aperture Control function operates only when shooting video(Movie mode) and the focusing mode of the camera is set to AF mode. Please set the aperture at f/1.8 before switching the "Custom Switch" to "Mode 2. It is recommended to set the "Exposure mode" as A mode (Aperture Priority AE) or M mode (Manual Exposure).

* How to use the “Preset Aperture Control” function?

1) Camera Body Setting
      AF Mode → Video Mode ('A' or 'M' mode) → Set the Aperture @F1.8
(2) Lens Setting
      Switch your "Custom Switch” to “Mode 2(M2)"
(3) Now, you're ready to use the Preset Aperture Control function with your focus ring

[What is Dolly Shot? How to Shoot Easily]

[What is Dolly shot?]

A dolly shot, also referred to as a tracking shot or trucking shot, is a camera movement technique used by cinematographers to track and follow a subject in motion. To achieve this, the camera is mounted on a device called a "dolly," which facilitates smooth tracking movement. The dolly can move in front of, behind, or alongside the subject, which can be a person, a location, a product, or any other object of focus in the frame. Through this, you can control the emotional distance between the subject and the viewer by highlighting the audiovisual and dramatic effects.

[How to take a Dolly Shot simply by handheld]

Tip. If the moving distance is long, the camera may shake, so please shoot at a focal length between 35 and 100mm.
1. Stand at a distance of about 1.5 to 2 meters away from the subject.
2. Set the custom switch to MF and Mode 3 and adjust the focal length to about 100mm.
3. After focusing on the subject, set the aperture to F8~16.
4. Slowly turn the zoom ring to the left (towards the wide-angle end) while using your upper body and arms to move the camera toward your subject.
5. Dolly Shot complete!
※ When shooting from a farther distance from the subject, use a cart or gimbal for more stable shooting.

DSLR / Full Frame
1D X Mark Ⅱ
1D X
1Ds Mark Ⅲ
1Ds
5DsR
5Ds
5D Mark Ⅳ
5D Mark Ⅲ
6D Mark Ⅱ
6D
DSLR / APS-H
1D Mark Ⅲ
1D
Mirrorless / APS-C
M6
M5
M10
M3
M2
DSLR / APS-S
7D Mark Ⅱ
7D
80D
70D
60D
30D
D60
D30
77D (9000D)
760D (8000D / Rebel T6s)
1300D (Kiss X80 / Rebel T6)
1200D (Kiss X70 / Rebel T5)
200D (Kiss X9 / Rebel SL2)
800D (Kiss X9i / Rebel T7i)
700D (Kiss X9i / Rebel T7i)
100D (Kiss X7 / Rebel SL1)
650D (Kiss X6i / Rebel T4i)
600D (Kiss X5 / Rebel T3i)
550D (Kiss X4 / Rebel T2i)
500D (Kiss X3 / Rebel T1i)
1000D (Kiss F / Rebel XS)
450D (Kiss X2 / Rebel X냐)
DSLR / Full Frame
D850
D5
D810A
D4S
D810
D750
Df
D610
D4
D800
D800E
D600
D3s
D3x
D700
D3
DSLR / APS-C
D7500
D3400
D500
D5600
D7200
D5500
D3300
D7100
D5300
D5200
D7000
D300s
D300
DSLR / Full Frame
Z6
Z7
D810A
D4S
D750
D810A
DSLR / APS-C
D7200
D500
D3300
D5500
D5600
D3400
D7500

* Cameras released within 5 years from 2019 are tested.

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