Sirui Swift 20mm f/2.4 (coming soon): B&H Photo
Sirui Swift 40mm f/2.2 (coming soon): B&H Photo
SIRUI has officially launched its new Swift series, introducing two ultra-compact, budget-friendly full-frame autofocus prime lenses built for everyday carry and hybrid creation: the SIRUI Swift 20mm F2.4 and SIRUI Swift 40mm F2.2. Engineered with all-glass optics in a lightweight body weighing just over 200 grams, the Swift series delivers fast, quiet autofocus and dedicated physical controls for photographers and videographers looking for portable full-frame glass without sacrificing optical quality.
Offering an expansive 91.5° diagonal angle of view, the Swift 20mm F2.4 is tailored for sweeping landscapes, architecture, street photography, and handheld vlogging. Its optical formula consists of 11 elements in 9 groups, incorporating two aspherical elements, two extra-low dispersion (ED) elements, and two high refractive index (HRI) elements to control distortion and chromatic aberration from corner to corner. With a close minimum focusing distance of 0.2m (7.9 in) and 0.14x maximum magnification, creators can move in tight on foreground subjects while preserving dramatic wide-angle environmental context and smooth background blur.
The Swift 40mm F2.2 delivers a natural 55.9° field of view that sits comfortably between classic 35mm and 50mm focal lengths, making it an ideal walk-around prime for street documentary work, travel, portraits, and daily storytelling. Built with 11 all-glass elements in 8 groups—including one aspherical element and two ED elements—the lens pairs crisp rendering with a bright f/2.2 maximum aperture for reliable low-light gathering and shallow depth-of-field separation. It focuses down to 0.4m (1.3 ft) for a 0.14x reproduction ratio.
Both lenses utilize a stepping motor (STM) autofocus system engineered for rapid, quiet, and accurate subject tracking alongside minimal focus breathing for smooth video focus transitions. Despite their entry-level price point, both Swift primes include tactile ergonomics typically reserved for higher-tier lenses: a clicked aperture ring, a physical AF/MF switch, and a customizable Fn button. Both lenses also share a unified 58mm front filter thread, include a petal-shaped lens hood, and feature weather-sealed, dust- and smudge-resistant construction for reliable location shooting.
Both the SIRUI Swift 20mm F2.4 and SIRUI Swift 40mm F2.2 are priced at US$149 each. The lenses are available to order in Sony E-mount, Leica L-mount, and Fujifilm X-mount.
Technical specifications and additional information:
| Specifications | Swift 20mm F2.4 | Swift 40mm F2.2 |
|---|---|---|
| Focal Length | 20mm | 40mm |
| Maximum Aperture | F2.4 | F2.2 |
| Minimum Aperture | F16 | F16 |
| Lens Mount | Sony E, Leica L, Fujifilm X | Sony E, Leica L, Fujifilm X |
| Lens Format Coverage | Full-Frame | Full-Frame |
| Angle of View | 91.5° | 55.9° |
| Minimum Focus Distance | 0.2m | 0.4m |
| Maximum Magnification | 0.14x (1:7.3) | 0.14x (1:7.3) |
| Optical Design | 11 Elements in 9 Groups | 11 Elements in 8 Groups |
| Special Elements | 2 Aspherical, 2 ED, 2 HRI | 1 Aspherical, 2 ED |
| Aperture Blades | 9 | 9 |
| Focus Motor | STM Autofocus | STM Autofocus |
| Aperture Ring | Clicked | Clicked |
| Controls | AF/MF Switch, Custom Fn Button | AF/MF Switch, Custom Fn Button |
| Filter Thread | 58mm | 58mm |
| Dimensions (Sony E) | 69.5 x 62.3 mm | 69.4 x 62.3 mm |
| Weight (Sony E) | 207g | 210g |
| Weather Protection | Weather-Sealed, Dust-Resistant | Weather-Sealed, Dust-Resistant |
| Price | US$149 | US$149 |
All specifications in the table above reflect the Sony E-mount full-frame configurations. On Leica L-mount bodies, the Swift 20mm F2.4 measures 69.5 x 60.3 mm and weighs 212g, while the Swift 40mm F2.2 measures 69.4 x 60.3 mm and weighs 215g.