TTArtisan AF 40mm f/2

Focal length: 40 mm
Aperture: f/2
Weight: –
Filter diameter: 52 mm
Min. focus distance: 40 cm
Length: –

Overview

The TTArtisan AF 40mm f/2 is a small autofocus prime for full frame mirrorless cameras, sold for Sony E, Nikon Z and Leica L mount. The 40 mm focal length sits between 35 mm and 50 mm and is often chosen for street, travel and documentary work. TTArtisan positions it as a compact and light all-rounder in a metal body.

Optical design

TTArtisan specifies 9 elements in 6 groups, including ED and aspherical elements. A review lists 2 high-refractive, 1 aspherical and 1 ED element. The aperture runs from f/2 to f/16 with 7 diaphragm blades, the angle of view is 57 degrees and the minimum focus distance is 0.4 m. The reviewer Dustin Abbott observed noticeable vignetting at f/2 and minor focus breathing, which should be read as one tester's finding.

Autofocus and handling

An STM stepping motor drives the autofocus, and the lens supports face detection. The aperture ring has detents and an A position for camera control. According to the same review there are no switches or custom buttons on the barrel and no visible weather sealing gasket. A Type-C port for firmware updates is built into the rear lens cap.

Build and size

The body is machined from 5052 aluminum. TTArtisan gives a weight range of about 166 g to 176 g depending on the mount. B&H lists 176 g for the Sony E version with 61 mm diameter and 44 mm length and 176 g for the Nikon Z version with 65 mm by 46 mm, while Dustin Abbott measured 167 g for Sony E. The filter thread is 52 mm and a metal hood is included. We have no dimensions for the L mount version.

Where it fits

There is no predecessor in our database. In the same focal length class the Sony FE 40mm F2.5 G weighs 173 g, the Viltrox AF 40mm F2.5 weighs 180 g on Sony E and Nikon Z, and the Nikkor Z 40mm F2 weighs 170 g. The TTArtisan matches them in weight while offering f/2 where the Sony and Viltrox lenses stop at f/2.5.

Pros and cons

Pros

About 170 g and very compact
f/2 aperture
Metal build with metal hood
Type-C firmware updates
Available for three full frame mounts

Cons

Vignetting at wide apertures according to a review
No AF/MF switch or custom button
Only 7 diaphragm blades
Weight and size figures differ between sources

Verdict

The TTArtisan AF 40mm f/2 is a lightweight, simple lens for photographers who value size and a classic aperture ring layout. Reviewers point to vignetting as a trade-off, and the spec sources are not perfectly consistent, but it joins the small and light 40 mm group at a clear f/2.

Technical Specifications

min focal length: 40 mm
max focal length: 40 mm
max f (min zoom): f/2
max f (max zoom): f/2
min. aperture: f/16
Elements: 9
Groups: 6
Weight: –
Filter diameter: 52 mm
min focus distance: 40 cm (15.75 in)
Length: –
Diameter: –

Simulate depth of field and angle of view

Which cameras does the TTArtisan AF 40mm f/2 fit?

The TTArtisan AF 40mm f/2 is a full-frame lens for L-Mount cameras. On full-frame bodies it uses the whole sensor; on APS-C L-Mount cameras its field of view equals 60 mm in full-frame terms.

L-Mount cameras

Full frame:: Leica SL3-P, Leica SL3-S, Sigma BF, Panasonic Lumix S1II, Panasonic Lumix S1IIE, Panasonic Lumix S1RII, Leica SL3, Panasonic Lumix S9, Blackmagic PYXIS 6K, Panasonic Lumix S5II, Panasonic Lumix S5IIX, Blackmagic Cinema Camera 6K, Panasonic Lumix BS1H, Leica SL2-S, Panasonic Lumix S5, Sigma fp L, Leica SL2, Panasonic Lumix S1, Panasonic Lumix S1R, Panasonic Lumix S1H, Sigma fp, Leica SL (Typ 601)
APS-C:: Leica CL, Leica TL2, Leica TL, Leica T (Typ 701)