SIRUI Swift Series 20mm F2.4 / 40mm F2.2 Full-Frame Autofocus Lens - 40mm / X
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SIRUI Swift Series 20mm F2.4 / 40mm F2.2 Full-Frame Autofocus Lens
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Warranty
Free replacement within 3 years for non-human product defects.
Swift Series Full-Frame Autofocus Lens
Swift in Hand Stunning in Frame
Just Launched
Light weight, Auto focus, Uncompromising Image Quality
High-Value Entry Grade Full Frame Lens
Effortless Creation by Daily Carry Lens
Daily Carry
20mm Ultra-Wide
View More. Capture More
The ultra-wide 20mm Swift lens provides an expansive perspective. Perfect for landscapes, street snaps, and vlogs, it is your lightweight everyday companion for effortless creation.
ILCE-7CM2 丨 20mm, 1/160s, f/2.4, ISO-100
ILCE-7CM2 丨 20mm, 1/80s, f/3.5, ISO-100
0.2m Minimum Focus Distance
Less Distance,Get closer
When 20mm ultra-wide angel meets 0.2m focus distance
Capture the fine details of the main subject
Reserve the background
Perfect for details , landscapes and group shoot. ——Let’s frame them all.
0.2m Minimum Focus Distance (20mm F2.4)
40mm Natural Perspective
Frame It as What It Is
Frame the world just as what you see. Ideal for portraits, street scenes and detail shooting.
0.4m Minimum Focusing Distance
Get Closer. Reveal the Details.
Auto Focus
Stay Focused on the Moment
An STM motor delivers quick, smooth autofocus, helping you keep moving subjects in focus and capture fleeting moments.
Made for Video
Smooth Focus. Natural Results.
Low distortion, natural color rendering, and minimal focus breathing help create a consistent look as focus shifts. Ideal for vlogs, short films, and time-lapse photography.
20mm F2.4
40mm F2.2
Clicked Aperture Ring
Adjust with a Simple Twist
Featuring a clicked aperture ring, the lens allows precise aperture adjustments with clear, tactile clicks for intuitive control.
Wide Aperture
More Light. Beautiful Background Blur.
F2.2
More Light Shallower Depth of Field More Background Blur
F2.8
Less Light Greater Depth of Field Less Background Blur
The wide aperture gathers more light for low-light shooting and creates soft background blur that helps your subject stand out. Ideal for portraits, night scenes, and atmospheric images.
Light in Hand Always by Your Side
Compact, palm-sized, and built to travel. From streets to sights, grab it and capture the moment your way.
(20mm E Mount)
Precision Optical Construction
Compact Size， Precision-Crafted Optics
All-Glass Optics
Reliable performance, built to last.
Plastic Lenses
More affected by temperature changes, may yellow or discolor over time.
20mm F2.4
11 Elements in 9 Groups
Aspherical Lens
ED Glass
HRI Lens
40mm F2.2
11 Elements in 8 Groups
Aspherical Lens
ED Glass
Aspherical Lens
Cuts lens weight while correcting spherical aberration and distortion for greater image transparency.
ED Glass
Suppresses dispersion and chromatic aberration for true-to-life, cinematic color tones.
HRI Lens
Boosts light transmission and reduces stray light for stronger contrast and depth.
20mm F2.4 MTF Chart
40mm F2.2 MTF Chart
Premium optical structure to ensure high solution, minimal distortion and excellent chromatic aberration control whist keeping compact lens size.
E / L Mounts
A Fit for Every Body
Available in multiple mounts to fit diverse camera systems.
E/L Mount Compatible
Crafted in the Details
Compact Design, Made for Creators
Clicked Aperture Ring
Clear clicks, direct control.
AF/MF Switch
Switches between autofocus and manual focus.
Customizable FN Button
Instant AFL focus lock or custom function assignment.
Lens Hood Included
Blocks stray light for cleaner images.
58mm Filter Thread
Compatible with standard filters.
More Protection
Dust-resistant
Smudge-resistant
Weather-sealed
Daily Carry
Wherever You Go, Your Lens Follows.
Swift in hand, everyday in frame.
# Travel
20mm｜Take in every sweeping vista
# Travel
40mm丨Record the fun along the journey
# Street
20mm｜Enhance depth and perspective
# Street
40mm｜Capture genuine human moments
# Architecture
20mm｜Capture a wider field of view
# Architecture
40mm｜Render architecture naturally
# Vlog
20mm｜Frame it effortlessly
# Vlog
40mm｜Record naturally
Quality You Can Trust
3-Year Replacement Warranty
Free replacement within three years for non-human damage (with valid proof of purchase). Lifetime paid repair service available for human-caused damage (e.g., drops, water, modifications).
*For more details, please refer to the warranty card.
What’s in the Box
Accessory List
Name
Quantity
Lens （20mm or 40mm）
x 1
Package Box
x 1
Lens Hood
x 1
Front Lens Cap
x 1
Back Lens Cap
x 1
Specifications
Product Name
20mm F2.4
40mm F2.2
Lens Format Coverage
Full Frame
Full Frame
Focal Length
20mm
40mm
Max Aperture
F2.4
F2.2
Min Aperture
F16
F16
Lens Structure
11 Elements in 9 Groups
11 Elements in 8 Groups
Aperture Blade
9
9
Shooting Distance
0.65ft (0.2m) - ∞
1.31ft (0.4m) - ∞
Minimum Focus Distance
0.65ft (0.2m)
1.31ft (0.4m)
Focus Method
MF / AF
MF / AF
Max Magnification
1:7.327 or 0.136x
1:7.3 or 0.14x
F0V
81.2°(H) 59.7°(V) 91.5°(D)
47.26°(H) 32.23°(V) 55.86°(D)
Filter Size
M58 × 0.75
M58 × 0.75
Focus Ring Rotation Angle
360°
360°
Max Diameter/Focus Ring Diameter/Aperture Ring Diameter
Up to 69% off
