Viltrox AF 15mm F/1.7 Air XF

Specifications01

MountFUJIFILM X

Focal length15mm

Max aperturef/1.7

TypeCinema · Wide · Prime

Weight180 g

Filter size58 mm

Physical length65 mm

Min focus distance0.23 m

Aperture blades9

Optical elements12

Groups10

Lens hoodpetal-shaped (bayonet mount, supplied)

Additional Info02

Category["Fujifilm"]

Keywords["Prime","Viltrox","X-mount"]

Review AuthorKlaus

Review Rating6.5

Other FeaturesUSB-C port for firmware updates

Review VerdictThe Viltrox AF 15mm f/1.7 Air XF is another welcome addition to their ever-increasing prime lens lineup. At least on 26-megapixel sensors, the sharpness is perfectly fine from f/2.8. At f/1.7, it's quite usable at least. A 40-megapixel sensor is more challenging, but this applies to most lenses really. Image distortions are on a low level, albeit a bit wavy. The vignetting is a bit on the high side which doesn't come as a surprise given the compact size of the lens. Sun stars aren't a big strength, if that's your thing. The build quality follows the tradition of the other Viltrox Air lenses. The engineering plastics are of good quality, and everything is tightly assembled. While it doesn't have any kind of weather sealing, the internal focusing mechanism should provide at least a bit of protection against dust. The AF uses an older-style STM motor. However, it's still pretty fast and essentially silent. It may not be the most fancy lens around, but budget-oriented users may certainly appreciate a lens that is decent, surprisingly fast and which still doesn't cost an arm and a leg Viltrox lenses are available via the usual suspects such as Amazon or B&H, or directly via the Viltrox Store .

Review Criteria{"Build Quality":7.5,"Optical Quality":6.5,"Price / Performance":10}

Review Published2025-07-30T13:02:11+00:00

Optical Construction12 elements in 10 groups, incl. 2x aspherical, 3x ED, 3x HR

Summary02

Viltrox AF 15mm f/1.7 is a fast prime wide-angle lens for Fujifilm X-mount APS-C cameras, intended for low-light, landscapes, and general wide coverage. Autofocus supports everyday use.

AI-assisted summary — verify against linked sources

Specifications from opticallimits

Where can this lens be adapted?

The Fujifilm X mount has a flange distance of 17.7 mm. A plain adapter fits a camera whose flange distance is at least 1.46 mm shorter. How lens adapters work

Native lenses set the aperture, and often the focus, electronically. On a plain adapter they do not work. Use an electronic adapter made for this pair; for many pairs nobody makes one. Fully manual lenses are the exception.