Lens manufacturer Sirui has introduced two compact autofocus primes for full-frame cameras, the Swift 20 mm f/2,4 and the Swift 40 mm f/2,2, both tipping the scales at roughly 210 grams, Fotosidan reported. The optics arrive with a recommended price tag of 2,199 SEK including VAT, with shipments slated to begin in December 2026.
Sirui Swift 20 mm f/2,4 and 40 mm f/2,2 Specifications
Part of the newly minted Swift lineup, both lenses launch with Sony E-mount and L-mount options. They share identical external dimensions featuring a 69.5 mm diameter, while lengths span 60 to 62 mm. Individual weights range from 207 to 215 grams depending on the specific model and camera mount.
The wider Swift 20 mm f/2,4 features a minimum focus distance of 20 centimeters. Its optical construction houses 11 lens elements, including two aspherical surfaces and two pieces of extra-low dispersion (ED) glass. By comparison, the Swift 40 mm f/2,2 offers a minimum focus distance of 40 centimeters. It similarly incorporates an 11-element design, though split into one aspherical element and two ED glass elements.
Autofocus Mechanics and Video Performance
Both models utilize a stepping motor (STM) for autofocus operation. Operators gain tactile control via a click-stopped aperture ring and a programmable function button. The internal aperture mechanism utilizes nine blades, and the filter diameter measures 58 mm across both primes. Both housings feature weather-sealing to protect against dust and water splashes.
Sirui states that the new lenses exhibit minimal focus breathing during operation. This optical characteristic serves as a distinct advantage for videographers transitioning focus points during filming.
Frequently Asked Questions About the Swift Series
What camera mounts are supported by the Sirui Swift lenses?
The Swift 20 mm f/2,4 and Swift 40 mm f/2,2 are manufactured for Sony E-mount and L-mount full-frame camera systems.
When will the lenses be delivered to buyers?
Deliveries for both optics are scheduled to begin in December 2026, carrying a recommended retail price of 2,199 SEK including VAT.
What are the close-focus capabilities of each focal length?
The 20 mm f/2,4 model achieves a minimum focus distance of 20 centimeters, while the 40 mm f/2,2 focuses down to 40 centimeters.