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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
4.8 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 4
Good quality but it was slightly longer than original and needed modification.
Style: BE-182 1-Pack
Bought this cabin filter for a 2023 Acura TLX. While the filter seems to be made of quality material, it was just a little too long (about a 1/16 of an inch, so I had to trim it to make it fit so the cover would fit snug. I was able to do that without compromising the filter itself. But this might be an issue for some people
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Fits my Chevy 2021 Bolt Premier perfectly.
Style: BE-966 1-Pack
Installation was a breeze, fir nicely and the air in teh car now smells fresh and clean. The old filter has developed a musty smell so this new one is great. Had it replaced in under 3 minutes.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
★★★★★ 5
Fits perfectly for my 2017 VW Passat
Style: BE-373 1-Pack, Style: BE-373 1-Pack
Bought this for a fraction of the cost. An auto shop wanted to charge me $72.99 for a filter so I bought this Spearhead brand cabin filter and its the perfect size and its just as sturdy as the previous one the dealership had in the car. Not sure yet how the airflow is or if anything different as I have not driven in the car since it was replaced, but it appears to be a very high quality cabin filter for my car at a great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Good Quality Replacement for Lexus
Style: BE-285 1-Pack
Was a perfect fit for my 2016 Lexus NX200t. No tools required. Total of 5 minutes to install. Airflow is good after replacement and the activated charcoal seems to make a difference in reducing any smells from outside. Recommended.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Economical, easy to install, and does the job!
Style: BE-182 1-Pack
First, depending on your car model, replacing your cabin air filter is VERY easy.
With that out of the way, the shop wanted to charge almost 65 dollars to replace my cabin air filter. Decided to just buy one and do it myself. The only downside of waiting is that the air inside the car is not as fresh/clean when you're running your air. Anyways, you can usually get these kinds of filters between 20-45 dollars from auto part shops depending on the brand and features. I've used this brand and filter for the past 3 replacements on my car and they last just as long and filter just as well from my experience. No issues installing, and does in fact do a good job of filtering outside odors.
Highly recommended for the price!
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Reviewed in the United States on March 16, 2026