Sirui Swift AF 20mm f/2.4 and 40mm f/2.2 Lenses Announced: $149 Budget Primes

Sirui has officially announced its brand-new lineup of budget-friendly full-frame autofocus prime optics: the Sirui Swift AF 20mm f/2.4 and Sirui Swift AF 40mm f/2.2. Designed for mirrorless creators across Sony E, Fujifilm X, and Leica L mounts, both compact lenses launch at an ultra-competitive price tag of $149 each, with shipping scheduled to begin on November 5th. To explore more full-frame glass options and system guides, visit our dedicated Lenses section.

Positioned as direct feature-packed competitors to Viltrox’s entry-level Air series, Sirui differentiates its Swift primes by equipping them with tactile physical controls typically reserved for higher price tiers. Both lenses integrate a clicked aperture ring, an AF/MF toggle switch, a customizable Function (Fn) button, a 9-blade rounded aperture diaphragm, and weather-resistant dust/splash sealing. To compare how these affordable options fit alongside rival third-party mirrorless glass, check out our comprehensive Best Third-Party Lenses Guide.

Autofocus performance across both optics is driven by a fast, quiet Stepper Motor (STM) system engineered with low focus breathing to keep framing stable during video focus shifts. The wider Swift 20mm f/2.4 utilizes an optical construction of 11 elements in 9 groups (including 2 aspherical, 2 ED, and 2 HRI elements) with a 0.2m close focus distance, weighing just 207g. Meanwhile, the Swift 40mm f/2.2 relies on 11 elements in 8 groups (1 aspherical and 2 ED glass) with a 0.4m close focus, weighing 210g. Both feature 58mm front filter threads and include petal-shaped lens hoods.

Key Features of the Sirui Swift AF Series

• Unbeatable $149 Entry Price: Full-frame autofocus performance paired with physical controls under $150.
• Pro Physical Ergonomics: Features a dedicated clicked aperture ring, AF/MF toggle switch, and customizable Fn button on the barrel.
• All-Weather Protection: Weather-sealed construction guards against dust and moisture, supplemented by a smudge-resistant front element coating.
• Quiet STM Autofocus Drive: Stepper motor technology ensures smooth, accurate focus tracking with minimized focus breathing for videography.
• Lightweight Compact Dimensions: 20mm measures 60.3mm long (207g) while the 40mm measures 62.3mm long (210g).
• Standardized 58mm Filter Threads: Both lenses share a unified 58mm front filter size for easy filter swapping.

How the Swift 20mm Compares on Sony E & L Mount

To help visualize where the Sirui Swift 20mm f/2.4 sits against rival lightweight wide-angle full-frame primes, consider the comparison below (sorted lightest to heaviest):

Price, Availability, and Warranty

The Sirui Swift 20mm f/2.4 and Swift 40mm f/2.2 are each priced at $149 USD. Both lenses are available now for pre-order via Amazon and the official Sirui online store, with official shipping commencing on November 5th. Sirui backs the Swift series with a 3-year warranty covering non-human damage alongside lifetime paid repair support.

Final Summary

The Sirui Swift AF 20mm f/2.4 and 40mm f/2.2 set a disruptive new benchmark for entry-level full-frame mirrorless optics. By offering smooth STM autofocus, weather sealing, an aperture ring, and a customizable Fn button for just $149 each, Sirui provides immense value for budget-conscious photographers and filmmakers. Secure your pre-orders today through our retail partner links above before launch day on November 5th!

Frequently Asked Questions

When will the Sirui Swift lenses be officially released?

Pre-orders are open now, and the official release and shipping date is November 5th.

What camera mounts are supported by the Sirui Swift series?

The Sirui Swift 20mm f/2.4 and 40mm f/2.2 are available in native mounts for Sony E, Fujifilm X, and Leica L-mount camera systems.

Are the Sirui Swift lenses weather sealed?

Yes, both lenses feature weather-resistant dust and splash protection along with a smudge-resistant front glass coating.