Viltrox 40mm f/2.5 - Lens review and specs

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Leica L Prime full-frame 2026

Autofocus

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Compare with

40mm

Focal length

f/2.5

Max aperture

169 g

Weight

14mm35mm85mm200mm600mm

▲ 40mm

Max aperture

f/1.8

f/2.5

f/5.6

Constant Aperture

Zoom Ratio: 1x

Aperturef/2.5

f/2.5f/16

Near focus6' 6"

Far focus7' 10"

Total DOF1' 4"

Hyperfocal72' 11"

Subject distance7' 1"

Focal length40 mm

Aperturef/2.5

SensorFull Frame

Illustrative scene preview based on this lens's focal length, aperture, and sensor coverage.

This preview uses 40mm, f/2.5, and Full Frame. Subject distance is estimated to keep lens previews comparable.

Min aperture: f/16
Diaphragm blades: 7

Optics

Optical construction: 10 elements in 6 groups
Special elements: 1 ED, 3 HR, 1 Aspherical
Coatings: HD Nano Multilayer Coating

Focusing

Minimum focus: 34 cm
AF motor: STM

Physical

Weight: 169 g
Dimensions: ⌀65mm × 58mm
Filter thread: 52 mm
Color: Black

Recommended Use

Ideal for: Street, Travel, Walkaround / Daily

Release year: 2026
Announced: Sep 22, 2026
Approx price: $168 USD
Optical correction & RAW development: NDPix Photo Editor

The best

An ultralightweight 40mm full-frame autofocus prime tailored for everyday L-mount shooting.

Also

Compact 169g construction with quick STM autofocus makes it a prime choice for street and travel.

Summary

The Viltrox 40mm f/2.5 is a lightweight and compact autofocus prime lens developed for full-frame cameras with Leica L mount, forming part of the Air series by Viltrox. Its 40mm focal length provides a natural and highly adaptable perspective, sitting right in the sweet spot between the contextual breadth of a 35mm and the tighter framing of a standard 50mm. This makes it an exceptionally practical walkaround solution for photographers seeking a discreet, everyday prime without added bulk.

The optical configuration incorporates 10 elements in 6 groups, featuring 1 extra-low dispersion (ED) element, 3 high-refractive index (HR) elements, and 1 aspherical element to effectively control chromatic aberrations and deliver sharp rendering across the frame. Autofocus is powered by a quiet and responsive STM stepping motor with an internal focusing mechanism, ensuring quick and reliable focus acquisition for both stills and video work alongside a minimum focus distance of 0.34 meters and a standard 52mm filter thread.

Weighing only 169 grams and measuring just 58mm in length, the Viltrox 40mm f/2.5 proves to be an outstanding companion for street photography, travel, documentary projects, and casual day-to-day shooting. Its 7-blade circular aperture produces pleasing background blur, establishing an impressive balance between solid optical performance, extreme portability, and strong value in the full-frame L-mount lineup.