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Description
SIRUI 20mm T1.8 1.33X S35 Frame Autofocus Anamorphic LensEXPANSIVE PERSPECTIVE S35 AUTO FOCUS ANAMORPHIC LENS Auto Focus, Precise Tracking Traditional anamorphic lenses often struggle with quick focus acquisition due to the lack of autofocus. The SIRUI 20mm T1. 8 1. 33x anamorphic lens, equipped with an STM stepping motor, delivers fast, accurate, and smooth autofocus. It also supports eye tracking, ensuring a stable and precise focus lock, even during high speed photography or video recording, capturing
EXPANSIVE PERSPECTIVE
S35 AUTO FOCUS ANAMORPHIC LENS
Auto Focus, Precise Tracking
Traditional anamorphic lenses often struggle with quick focus acquisition due to the lack of autofocus. The SIRUI 20mm T1.8 1.33x anamorphic lens, equipped with an STM stepping motor, delivers fast, accurate, and smooth autofocus.
It also supports eye-tracking, ensuring a stable and precise focus lock, even during high-speed photography or video recording, capturing every decisive moment with clarity.
It also supports eye-tracking, ensuring a stable and precise focus lock, even during high-speed photography or video recording, capturing every decisive moment with clarity.
Video Recording
STM stepping motor, fast focus/tracking
Eye-tracking
Unlock a new photography and film making experience
AF & MF Focus Modes
Seamlessly switch between autofocus and manual focus to meet diverse shooting demands and achieve professional-grade cinematic visuals.
20mm Expansive Perspective
With a horizontal field of view equivalent to a 22mm full-frame lens, this wide-angle lens captures expansive landscapes, breathtaking starry skies, and tight indoor spaces with ease.
20mm
About 22mm
T1.8
0.4m
Wide Angle
Horizontally Equivalent to Full Frame
Fast Aperture
Minimum Focus Distance
0.4m Minimum Focus Distance
Breaking the technical barriers of anamorphic lenses, the 0.4m minimum focus distance, combined with a fast T1.8 aperture, enhances depth and spatial perception, creating visually immersive shots with striking impact.
Wide-screen Cinematic Aspect Ratio
With a constant 1.33x squeeze factor, this lens delivers a stunning 2.35:1 widescreen cinematic aspect ratio in 16:9 mode, maximizing sensor utilization for a truly immersive viewing experience.
Restore
Lens with max image circle of 37mm is most suitable for S35 or almost covers all full frame cameras. Certain amount of vignetting will occur when used in full frame cameras.
20mm Image Circle 37mm
Image Circle 43.3mm
T1.8 Fast Aperture
Fast T1.8 aperture makes sure more light enters the sensor so that it can reduce ISO and deliver a pure night scene. Besides, there are 11 aperture blades included. Even in low-light situation, you can get outstanding image with sharp subject, blurred background and soft bokeh.
Outstanding Optical Performance
16 Elements
in 12 Groups
in 12 Groups
High-quality cinematic image
Aspherical Lens*1
Reduce weight and correct chromatic aberration
Cylindrical Lens*5
Control light distribution and adjust aspect ratio.
Choose Your Signature Flare
Blue or Neutral
Classic Blue Flare
Suitable for sci-fi, mystery and music video scenes.
Neutral Flare
Adapt to light sources for natural and warm commercial or portrait shooting.
Stunning Bokeh
Unique lemon-shaped oval bokeh at fast aperture
Image with sharp subject and dreamy bokeh
Compact & Lightweight
Weighing only 480g with a compact 96mm length, this lens is perfect for handheld, vehicle-mounted, or gimbal-assisted shooting.
Handheld
Gimbal
Consistent Set Design Seamless Lens Swapping
All lenses in the series feature identical gear positions, a uniform 77mm filter thread, and consistent color tones. This ensures effortless lens swapping, even when shooting with a gimbal, without the need for accessory readjustments.
Convenient Operation
Click ON/OFF
AF/MF Button
AFL Button
(E/L-Mount)
(E/L-Mount)
Stepless aperture or not
Switch between autofocus and manual focus
Autofocus lock /custom setting
Standard gears, 360° focus throws
Electronic contact for EXIF transfer
Aluminum alloy shell
Filter size 77mm
Firmware update via Type-C
Native mounts: E, X, L, MFT compatible with major cameras
AF Auto Focus + MF Manual Focus Start Your Cinematic Trip
Compatibility
What's in the Box
1
Lens2
Package Box3
Pouch4
Strap5
Front Lens Cap6
Back Lens Cap7
Warranty CardSpecifications
Model
20mm T1.8 1.33x Auto Focus
Anamorphic Cine Lens
Anamorphic Cine Lens
Lens Format Coverage
S35/APS-C
Focus Length
20 mm
Max Aperture
T1.8
Min Aperture
T22
Lens Structure
16 Elements in 12 Groups (Including 5 Cylindrical Lenses and 1 Aspherical Lens)
Aperture Blade
11
Shooting Distance
0.4m（1.31ft）～∞
Focus Method
Manual/Auto
Max Magnification
1:15.4(V), 1:20.6(H)
F0V(APS-C)
38.974°(V), 73.906°(H), 78.324°(D)
Filter Thread
M77*P0.75
Focus Throws
360°
Max Diameter
∅86.4mm/3.4inch
Focus Ring Diameter
∅86.4mm/3.4inch
Aperture Ring Diameter
∅80mm/3.15inch
Motor
STM
AF/MF Switch
Click (ON/OFF)
AFL Button
Length (mm/inch)
(Without Lens Caps)
(Without Lens Caps)
E: 90.95/3.58 X: 91.25/3.59
MFT: 89.75/3.53 L: 88.35/3.48
MFT: 89.75/3.53 L: 88.35/3.48
Weight (g/lb)
(Without Lens Caps)
(Without Lens Caps)
E: 489.3/1.08 X: 488.4/1.08
MFT: 479.5/1.06 L: 494.5/1.09
MFT: 479.5/1.06 L: 494.5/1.09
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Amazing brand
Color: Silver Gold
Love these watches so much.
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Reviewed in the United States on January 13, 2026
★★★★★ 5
good for big wrists
my wrist is almost 9 inches so some choices are too small. plus I like a slightly loose fit rather than snug. it's beautiful just like the pictures. happy with it.
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Reviewed in the United States on June 10, 2022
★★★★★ 5
Husband loved the watch
Husband loved it! Very nice and heavy
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Es igual como se muestra en la imagen
Excelente
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Great watch on that price
Amazing
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Reviewed in the United States on September 1, 2025