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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
4.5 ★★★★★
Based on 2408 reviews
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Product Reviews
★★★★★ 4
Excellant value
Special Size: Wide Leg Crop, Size: 14, Color: Rinse, Special Size: Wide Leg Crop, Size: 14, Color: Rinse
Purchased the “cropped” length. I am 5ft 3.5 inch. Weight 170lbs (42 inch hip/38 inch waist) normally wear a size 10/12 or 31 in jeans, depending on the brand. I ordered up at 14 for these based on other reviewers. (When held up to other jeans they were the same as a Talbots 10 at the waist)
Prewash they felt good, a little big& length hit at the top of my foot. After wash and dry, the fit was almost perfect and the length was at lower ankle. Ordering up is probably the right choice, although I think I could have been comfortable in a 12 (with no drying). They are a tad bit too long for a “cropped” look IMO. The wide leg is a true wide leg and falls straight from the waist. The material is heavy and there is almost no give/stretch - so a traditional denim. This is the dark blue and it is a true dark blue. You can’t beat the price, excellent value.
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Reviewed in the United States on March 31, 2026
★★★★★ 3
Cropped ones are better, size issue with full length pants
Special Size: Wide Leg, Size: 18, Color: Authentic Medium Wash
These are very small in the waist and about 8 inches too long (and I'm not even that short). Very well constructed though so I'll keep them on hand as I'm on a weight loss journey. These were an 18 and fit more like a larger 14.
The cropped ones are AWESOME. I ordered a second pair in a different color. They fit absolutely perfectly and hit me around the ankle length wise. Adore them.
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Reviewed in the United States on September 28, 2025
★★★★★ 5
GET THESE JEANS!!
Special Size: Wide Leg Crop, Size: 12, Color: Iced Blue Light Wash, Special Size: Wide Leg Crop, Size: 12, Color: Iced Blue Light Wash
I ordered these jeans because they were recommended by a youtube influencer and I have 0 regrets! They are a fairly heavy denim with just the right amount of stretch to them. I'd consider them to be mid to high waisted since the closure is right below my belly button. However, if I hike them up a bit they sit right above the belly button. I washed and dried them with little to no shrinkage. Length-wise they're slightly cropped on me, and fall right above the ankle. These jeans are honestly SO versatile because they look great with ballet flats, heels, tennis shoes, AND suede or leather ankle boots! Since I couldn't decide, I ordered them in two colors (iced blue light wash & medium blue vintage), and I love them both!! For reference, I'm 5'6 and 170 lbs. I ordered size 12 and they fit great. Highly recommend. You CANNOT beat the price for this level of quality in my opinion!!
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Reviewed in the United States on October 4, 2025
★★★★★ 5
My everyday Jean
Special Size: Wide Leg Crop, Size: 8, Color: Medium Blue Vintage
They don’t have much of a stretch to them but they do get a bit more lose around the waist when you wearing often. Got a size 8 was tight but after a few uses they got perfect. Be Definitely is a thick jean material tucks in any unwanted over hang. Don’t tumble dry they do shrink
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Reviewed in the United States on May 16, 2026
★★★★★ 4
Good Jean for the price waist hips run small
Special Size: Wide Leg, Size: 18, Color: Black
These pants are good for the price. I needed a pair of wide leg black jeans and the price on these was good. Reviews said the waist was small. I’m a 16/18. Got an 18. And the high waist (up to my belly button) fits snug but has a little give. Still comfortable to wear. The butt thigh area fits snugger than most wide leg pants but again not so tight or uncomfortable to not wear. The fabric is a brushed Jean fabric not just a woven cotton Jean so dog hair sticks to it like glue. They are a heavy quality fabric so not a summer pant. They are a keeper for me. If a gain a few pounds I can these being a no go.
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Reviewed in the United States on February 27, 2026
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