Sirui Swift 20mm F2.4 (L-Mount)
Launch MSRP
$149- Weight
- 212g
- Filter
- ⌀58mm
- Min focus
- 0.20m
- Max mag.
- 0.14×
- Formula
- 11E / 9G
- Released
- 2026
Also made for
The L-Mount version is 5g heavier than the Sony E-mount version.
Specification sheet
Optical construction
- Aspherical
- ED Glass
- HRI
- Aperture range
- f/2.4 — f/16
Physical & ergonomics
- Weight
- 212g
- ⌀ × length
- 69.5 × 60.3mm
- Filter
- ⌀58mm
- Weather sealed
- Yes
- Aperture ring
- Yes
Autofocus actuator
- Stabilisation
- Body IBIS
- Teleconverter
- Not supported
- AF speed score
- —
Close-up performance
- Min focus distance
- 0.20m
- Max magnification
- 0.14× (1:7.4)
Optical character
The Swift 20mm F2.4 is Sirui's entry-level full-frame autofocus prime at $149, a 11-element, 9-group design weighing 212g on L-Mount. It is a wide, for landscapes, street and vlogs lens: it focuses as close as 0.2m and uses an STM motor with an AF/MF switch and a customisable Fn button.
The barrel carries a clicked aperture ring, a 9-blade diaphragm and a 58mm filter thread, with dust, smudge and weather resistance. Sirui supplies a hood in the box and says the design keeps focus breathing minimal. It is an all-glass design with aspherical, ED glass, HRI.
Reviewer consensus
We summarise professional reviews only after reading at least two independent ones. Not enough have been published or verified for this lens yet.
Owner sentiment
Owner feedback will appear once we have verified real-world reports for this lens.
Strengths, weaknesses & performance
Strengths
- +$149 launch price
- +212g and 60.3mm long
- +Clicked aperture ring and Fn button
- +Weather-resistant, 58mm filters
- +Closest focus 0.2m
Weaknesses
- −STM autofocus; no independent testing yet
- −F2.4 maximum aperture is modest
- −No image stabilisation
- −Pre-order; no reviews published yet
Six-axis rating
Ratings are published once at least two independent professional reviews have been read.
Technical specifications
| Mount | L-Mount (FF) · full frame |
|---|---|
| Focal length | 20mm |
| Category | Wide |
| Maximum aperture | f/2.4 |
| Minimum aperture | f/16 |
| Construction | 11 elements in 9 groups |
| Special elements | Aspherical · ED Glass · HRI |
| Aperture blades | 9 |
| Focus type | Autofocus |
|---|---|
| Drive | STM |
| Minimum focus | 0.20m |
| Max magnification | 0.14× |
| Stabilisation | None (uses body IBIS) |
| Teleconverters | Not supported |
| Weight | 212g |
|---|---|
| Diameter × length | 69.5 × 60.3mm |
| Filter thread | ⌀58mm |
| Weather sealing | Yes |
| Aperture ring | Yes |
| De-clickable aperture | No |
| Release year | 2026 |
| Launch MSRP | $149 USD |
Sources
Verified against the pages below. Specifications come from the maker; summaries only reflect reviews and owner reports we actually read.
Specifications
- store.sirui.com› products/sirui-swift-series-20mm-f2-4-40mm-f2-2-full-frame-a
Launch price
- dpreview.com› news/siruri-is-joining-the-race-to-build-150-autofocus-prime
Similar focal length alternatives
- VSSwift 20mm F2.4 (L-Mount) vs 20mm f/4 Zero-D Shift (L-Mount)
- VSSwift 20mm F2.4 (L-Mount) vs LUMIX S 20mm F2.5
- VSSwift 20mm F2.4 (L-Mount) vs 20mm F1.4 DG DN | Art (L-Mount)
- LaowaZero-D
20mm f/4 Zero-D Shift (L-Mount)
20mmF4- WT
- 747g
- FLT
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- MFD
- 0.25m
- MSRP
- $1,099
MFRING - Panasonic
LUMIX S 20mm F2.5
20mmF2.5- WT
- 142g
- FLT
- ⌀62mm
- MFD
- 0.18m
- MSRP
- $498
AFWR - SigmaArt
20mm F1.4 DG DN | Art (L-Mount)
20mmF1.4- WT
- 635g
- FLT
- ⌀82mm
- MFD
- 0.23m
- MSRP
- $899
AFWRRING·DC
