TTArtisan AF 40mm f/2 - Lens review and specs

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40mm

Focal length

f/2

Max aperture

167 g

Weight

14mm35mm85mm200mm600mm

▲ 40mm

Max aperture

f/1.4

f/2

f/4

Constant Aperture

Aperturef/2

f/2f/16

Near focus6' 7"

Far focus7' 8"

Total DOF1' 1"

Hyperfocal91' 2"

Subject distance7' 1"

Focal length40 mm

Aperturef/2

SensorFull Frame

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

This preview uses 40mm, f/2, and Full Frame. Subject distance is estimated to keep lens previews comparable.

Min aperture: f/16
Diaphragm blades: 7

Optics

Optical construction: 9 elements in 6 groups
Special elements: 1 ED, 1 Aspherical
Coatings: Multi-layer Coating

Focusing

Minimum focus: 40 cm
AF motor: STM

Physical

Weight: 167 g
Dimensions: ⌀61mm × 44mm
Filter thread: 52 mm
Hood included: Yes
Color: Black

Recommended Use

Ideal for: Street, Travel, Walkaround / Daily

Release year: 2025
Announced: Aug 8, 2025
Approx price: $168 USD

The best

A bright f/2 compact prime delivering natural perspective and tactile control.

Also

All-metal build and physical aperture ring make it an engaging daily walkaround lens.

Summary

The TTArtisan AF 40mm f/2 from TTArtisan is an ultra-compact, full-frame autofocus prime lens designed for photographers who value stealth, portability, and agility across street, travel, and everyday documentary photography. Offering a versatile 40mm focal length, it occupies a coveted sweet spot between the wider angle of a classic 35mm and the tighter framing of a 50mm normal lens. This provides a natural, intuitive perspective that closely mirrors normal human field of view without introducing distracting perspective distortion, making it a compelling walkaround companion for capturing unscripted moments.

Optically, the lens houses 9 elements arranged across 6 optical groups within a miniature all-metal barrel measuring just 61 x 44 mm and weighing approximately 167 grams. Its optical formula incorporates both extra-low dispersion (ED) glass and a high-precision aspherical element designed to suppress chromatic aberrations, control spherical distortion, and maintain crisp contrast across the image circle. Unlike many budget compact primes that restrict maximum aperture to f/2.5 or f/2.8 to conserve space, this design delivers a bright f/2 maximum aperture, giving creators a tangible advantage under low light while rendering smooth, cinematic background blur with pleasing subject separation.

In practical day-to-day operation, the lens provides an engaging tactile experience rarely seen in affordable autofocus optics, featuring an all-metal aviation aluminum chassis and a physical clicked aperture ring equipped with an 'A' position for camera-controlled exposure. The integrated STM stepping motor delivers swift, virtually silent autofocus performance that seamlessly integrates with modern eye and face detection tracking. Firmware updates are conveniently applied via a built-in USB-C port located directly on the rear lens cap. While it lacks weather-sealing gaskets and in-lens optical stabilization, its lightweight form factor and direct manual ergonomics make it an exceptional prime to keep permanently mounted on any compatible full-frame mirrorless body.