{"id":12037,"date":"2026-10-30T04:03:45","date_gmt":"2026-10-30T03:03:45","guid":{"rendered":"https:\/\/www.brokenmount.com\/bm\/2026\/10\/30\/siruis-149-autofocus-primes-are-light-on-price-not-features\/"},"modified":"2026-10-30T04:03:45","modified_gmt":"2026-10-30T03:03:45","slug":"siruis-149-autofocus-primes-are-light-on-price-not-features","status":"publish","type":"post","link":"https:\/\/www.brokenmount.com\/bm\/2026\/10\/30\/siruis-149-autofocus-primes-are-light-on-price-not-features\/","title":{"rendered":"Sirui\u2019s $149 autofocus primes are light on price, not features"},"content":{"rendered":"
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\n\tWith 20mm F2.4 and 40mm F2.2 options, the new Swift series gives Sony E, Fujifilm X, and L-mount users more budget-friendly choices.<\/p>\n

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When you use DPReview links to buy products, the site may earn a commission.<\/p>\n<\/div>\n<\/section>\n

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Sirui has announced a new series of prime, autofocus lenses<\/a>. The Swift lineup includes two focal lengths at launch \u2013 20mm F2.4 and 40mm F2.2 \u2013 both of which are compact, lightweight offerings that are available in L, E and X mounts for just $149.<\/p>\n<\/div>\n<\/section>\n

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Unlike Viltrox\u2019s similarly affordable 20mm F2.8 and 40mm F2.5 Air lenses, both Swift primes include useful on-lens controls. That includes a clicked aperture ring, a manual focus ring, a customizable Fn button and an AF\/MF switch. <\/p>\n

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Both of the Swift lenses are compatible with 58mm filters. A stepper motor drives autofocus in each lens, with Sirui promising minimal focus breathing. They each feature a nine-bladed aperture diaphragm. The company also says the lenses are weather-resistant, with protection against dust and splashes.<\/p>\n

The 20mm F2.4 lens features an 11-element in 9-group optical design, with 2 aspherical, 2 ED and 2 HRI elements. It can focus as close as 0.2m (0.65\u2032). Sirui doesn\u2019t provide weights or measurements for the X-mount model, but the L-mount version weighs 212g (7.5oz), while the E-mount comes in at 207g (7.3oz). They measure 60.3mm (2.4\u2033) and 62.3mm (2.5\u2033) long, respectively.<\/p>\n<\/div>\n<\/section>\n

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The 40mm F2.2 lens features a slightly different optical design, with 11 elements in 8 groups. That includes one aspherical lens and two ED elements. Its minimum focusing distance is 0.4m (1.3\u2032). Its size and weight are very similar to the 20mm lens, with the E-mount version weighing 210g (7.4oz) and measuring 62.3mm (2.5\u2033). The L-mount model weighs 215g (7.6oz) and measures 60mm (2.36\u2033).<\/p>\n

The new Swift 20mm F2.4 and 40mm F2.2 are available to pre-order<\/a> now for $149.<\/p>\n

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Sirui Swift 20mm F2.4<\/h3>\n