Description
Sirui Swift 20mm F2.4
Key Specifications
- Full-frame 20mm ultra-wide autofocus lens
- F2.4 maximum aperture, 9 aperture blades
- STM autofocus motor with AF/MF switch
- 0.2m minimum focus distance, 0.136x max magnification
- Clicked aperture ring and FN button
- 11 elements in 9 groups, 58mm filter thread
- Light 207g body (Sony E version)
- Available in Sony E, L and Fujifilm X mounts
- Warranty: 1 Year Official Warranty
Product Description
Sirui Swift 20mm F2.4 is the ultra-wide lens of SIRUI's new Swift series, a light and compact full-frame autofocus lens made for everyday carry. Its 20mm view fits landscapes, street photos, interiors and vlogs, and it weighs only about 207 g on Sony E mount.
Ultra-wide view for daily shooting
The 20mm focal length gives a wide view for landscapes, street scenes, group shots and walk-and-talk vlogs, while the small size keeps it easy to carry all day.
Close focus at 0.2m
You can focus as close as 0.2m, so you can get near the main subject, keep the background in frame and show fine detail.
Quick and smooth STM autofocus
An STM motor gives fast and quiet autofocus that helps keep moving subjects sharp, with a switch to change between AF and MF.
Made for video
SIRUI designed the lens for low distortion, natural colour and minimal focus breathing, so the look stays consistent when focus changes in vlogs, short films and time-lapses.
Hands-on controls
A clicked aperture ring gives precise, tactile aperture steps, and the FN button can be assigned to a camera function.
Technical Specifications
| Lens Format Coverage |
Full Frame |
| Focal Length |
20mm |
| Max Aperture |
F2.4 |
| Min Aperture |
F16 |
| Lens Structure |
11 elements in 9 groups |
| Aperture Blades |
9 |
| Minimum Focus Distance |
0.2m (0.65ft) |
| Focus Method |
MF / AF |
| Max Magnification |
1:7.327 (0.136x) |
| Field of View |
81.2° H / 59.7° V / 91.5° D |
| Filter Size |
M58 × 0.75 |
| Focus Ring Rotation Angle |
360° |
| Max Diameter |
69.5mm |
| Focus Motor |
STM |
| AF/MF Switch |
Yes |
| Clicked Aperture Ring |
Yes |
| FN Button |
Yes |
| Length (excluding lens cap) |
E: 62.3mm / L: 60.3mm |
| Weight (excluding lens cap) |
E: 207g / L: 212g |
| Mount Options |
Sony E, L-Mount, Fujifilm X |
| Warranty |
1 Year Official Warranty |
In the Box
- Sirui Swift 20mm F2.4 lens × 1
- Lens hood × 1
- Front lens cap × 1
- Back lens cap × 1
- Package box × 1
Available Configurations
- Sony E mount
- L mount
- Fujifilm X mount
Our team confirms the exact configuration with your order.
Frequently Asked Questions
Which mounts is the Sirui Swift 20mm F2.4 available in?
It is available in Sony E mount, L mount and Fujifilm X mount versions.
Is the Sirui Swift 20mm F2.4 a full-frame lens?
Yes. It covers full-frame sensors and also works on APS-C cameras of the same mount.
What is the minimum focus distance?
The lens focuses as close as 0.2m (0.65ft) with a maximum magnification of 0.136x.
Does it have autofocus?
Yes. It uses an STM autofocus motor and has an AF/MF switch on the barrel.
What filter size does it use?
It uses 58mm (M58 × 0.75) screw-in filters.
Is there a Sirui Swift 40mm lens too?
Yes. The Sirui Swift 40mm F2.2 is the natural-perspective lens in the same series and is listed separately.
Does the Sirui Swift 20mm F2.4 come with a warranty?
Yes, it comes with 1 Year Official Warranty.
Is the Sirui Swift 20mm F2.4 at Lens Ground genuine?
Yes. Every product sold by Lens Ground is 100% genuine.
