Summary
- SIRUI has launched the Swift 20mm f/2.4 and 40mm f/2.2 autofocus primes.
- Sony E and L-Mount versions cover full frame, with an X-Mount option for Fujifilm APS-C.
- Both feature STM autofocus, an aperture ring, an AF/MF switch and an Fn button.
- US pricing is $149 each, while SIRUI’s European store lists €159.
SIRUI has introduced the Swift 20mm f/2.4 and 40mm f/2.2, two compact autofocus primes priced at $149 each and fitted with controls that are far from standard in this price bracket.
Announced on October 29, 2026, the new series targets photographers and filmmakers looking for a lightweight everyday prime. Sony E and L-Mount versions cover full-frame sensors, while an X-Mount option is also available for Fujifilm APS-C cameras.
20mm for wide compositions, 40mm for everyday photography
The Swift 20mm f/2.4 delivers a 91.5-degree diagonal field of view on full frame and focuses as close as 20 cm. It is the more compelling option for landscapes, architecture, interiors and vlogging, especially when you want a wide composition without adding much bulk to a compact camera.
The Swift 40mm f/2.2 has a more natural-looking perspective for street scenes, travel, daily life and environmental portraits. Minimum focus distance is 40 cm. On Fujifilm X cameras, the APS-C crop factor makes these focal lengths approximately equivalent to 30mm and 60mm on full frame.
Autofocus, tactile controls and optical design
Both Swift lenses feature an STM autofocus motor, a manual-focus ring, a clicked aperture ring with an A position, a dedicated AF/MF switch and a customizable Fn button. They also have 58mm filter threads and nine-blade diaphragms. SIRUI describes their construction as resistant to dust and splashes and claims reduced focus breathing for video work.
At this price, having direct controls matters: you can switch between AF and MF or adjust aperture without digging through menus. Other budget full-frame options include the Viltrox Air 20mm f/2.8 and 40mm f/2.5 for L-Mount, which are lighter but take a different approach to on-lens controls.
| Specification | Swift 20mm f/2.4 | Swift 40mm f/2.2 |
|---|---|---|
| Optical construction | 11 elements / 9 groups | 11 elements / 8 groups |
| Special glass | 2 aspherical, 2 ED, 2 HRI | 1 aspherical, 2 ED |
| Minimum focus | 0.20 m | 0.40 m |
| Maximum magnification | approximately 0.14× | approximately 0.14× |
| Aperture range | f/2.4–f/16 | f/2.2–f/16 |
| Sony E weight | 207 g | 210 g |
| L-Mount weight | 212 g | 215 g |
| Filter thread | 58 mm | 58 mm |
Dimensions are nearly identical, with a diameter of approximately 69.5mm and lengths of roughly 60–62mm depending on mount. The weight figures above apply to E and L versions; equivalent confirmed X-Mount weights have not been published.
More information here.
Price and availability
The US launch price is $149 per lens. SIRUI’s official European storefront shows €159 including tax in its European listing, while European distributor Focus Nordic quotes a €189 recommended retail price for certain markets. These are different regional retail prices, not a currency conversion.
The lenses are listed for preorder, with stock and expected shipping dates varying by market. Official mount options at launch are Sony E, L-Mount and Fujifilm X; Nikon Z is not among the announced options.
What we think
At $149, the notable thing is not simply getting autofocus. It is that SIRUI has kept the aperture ring and AF/MF switch rather than stripping away hands-on controls to hit the price. When you are shooting quickly—whether on the street or on a small video job—those details can make the lens more practical to use.
For me, the 20mm looks especially useful for travel and filmmaking with a small mirrorless camera. Focusing down to 20 cm offers room for engaging foregrounds while keeping the environment in view. The 40mm makes sense as an understated, walk-around prime, especially if you prefer an angle of view closer to everyday vision.
I would want to see independent tests of autofocus during video, edge sharpness and wide-open image quality before drawing conclusions on performance. Manufacturer samples provide an early impression, not the whole story. Even so, this pricing makes the compact prime category noticeably more competitive.
Frequently asked questions
Do the SIRUI Swift lenses cover full frame?
Yes. The Sony E and L-Mount versions are designed for full frame. Fujifilm X versions mount on APS-C cameras and deliver fields of view roughly equivalent to 30mm and 60mm.
Is there a Nikon Z version?
Not at launch. The mounts listed by SIRUI are E, L and X.
