What's the difference between the Voigtländer Ultron 27mm F2 X and the 7Artisans 7Artisans 35mm f/1.2 II?

The Ultron 27mm F2 X leads on a lighter 120g body, closer 0.25 m focusing. The 7Artisans 35mm f/1.2 II leads on a brighter f/1.2 maximum aperture.

Which is smaller, the Voigtländer Ultron 27mm F2 X or the 7Artisans 7Artisans 35mm f/1.2 II?

The Ultron 27mm F2 X is the smaller, lighter lens at 120g and 23.5 mm long, versus 218g for the 7Artisans 35mm f/1.2 II.

Which is faster, the Voigtländer Ultron 27mm F2 X or the 7Artisans 7Artisans 35mm f/1.2 II?

The 7Artisans 35mm f/1.2 II is the faster lens at f/1.2, against f/2 for the Ultron 27mm F2 X — brighter in low light and able to throw the background further out of focus.

Voigtländer Ultron 27mm F2 X vs 7Artisans 7Artisans 35mm f/1.2 II: full comparison

The Ultron 27mm F2 X leads on more of the measurable specs, but the 7Artisans 35mm f/1.2 II counters on a brighter f/1.2 maximum aperture.

Read the full Ultron 27mm F2 X review →Read the full 7Artisans 35mm f/1.2 II review →

The short version

The Voigtländer Ultron 27mm F2 X and 7Artisans 7Artisans 35mm f/1.2 II are two X-mount primes at different focal lengths — the Ultron 27mm F2 X (40mm equivalent) and the 7Artisans 35mm f/1.2 II (52.5mm equivalent).

On the spec sheet the Ultron 27mm F2 X pulls ahead with a lighter 120g body and closer 0.25 m focusing.

The 7Artisans 35mm f/1.2 II answers with a brighter f/1.2 maximum aperture.

So which one? Start with the focal length you actually want to shoot: the 40mm-equivalent Ultron 27mm F2 X or the 52.5mm-equivalent 7Artisans 35mm f/1.2 II. Once that's settled, Ultron 27mm F2 X has the edge on the specs above.

Where the Ultron 27mm F2 X wins

+a lighter 120g body
+closer 0.25 m focusing

Where the 7Artisans 35mm f/1.2 II wins

+a brighter f/1.2 maximum aperture

Who should buy the Ultron 27mm F2 X or 7Artisans 35mm f/1.2 II?

Buy the Ultron 27mm F2 X if…

Pick the Ultron 27mm F2 X if a lighter 120g body and closer 0.25 m focusing matter to you. Photographers who want the deliberate, set-the-camera-first way of shooting a rangefinder-style prime on a small Fuji body, and who value rendering and build over autofocus and sealing. Read the full Ultron 27mm F2 X review for the details.

Buy the 7Artisans 35mm f/1.2 II if…

Pick the 7Artisans 35mm f/1.2 II if a brighter f/1.2 maximum aperture matters to you. Photographers who want a fast lens with a distinctive look for very little money, and who already shoot manual focus by choice. Read the full 7Artisans 35mm f/1.2 II review for the details.

Ultron 27mm F2 X vs 7Artisans 35mm f/1.2 II: pros and cons

Voigtländer Ultron 27mm F2 X	7Artisans 7Artisans 35mm f/1.2 II
Sharp in the centre from f/2, with short focus falloff and clean specular highlights. All-metal build, third-stop aperture clicks, and a focus tab with a hard infinity stop. Ten straight blades give defined ten-point sunstars from around f/2.8. Electronic contacts: EXIF, focus peaking and check, distance display, IBIS, X-Pro3 parallax correction. 25 cm minimum focus at a 40 mm-equivalent view — close enough for detail work.	f/1.2 for around the price of a filter, in an all-metal barrel. Strong wide-open character: halation around highlights, swirling corners. 0.28 m minimum focus, closer than the original version managed. Ten rounded blades keep the stopped-down rendering tidier than the price suggests.
No autofocus, and a short focus throw that compresses everything past a few metres. Corners lag the XF 23mm F2 R WR wide open and only catch up around f/8. No weather sealing on a lens people mount to sealed X-Pro and X-T bodies. Post-2024 firmware on some Fuji bodies writes f/22 into EXIF instead of the set aperture. Around $600 — roughly 1.5× Fujifilm's own autofocusing 27mm pancake.	No electronic contacts: no EXIF, no aperture recorded, no IBIS, no auto magnification. f/1.2 and f/1.4 are effects, not working apertures — sharp from about f/4. Heavy longitudinal colour fringing on high-contrast edges wide open. Sample variation is the standing complaint about the category; no sealing, no real warranty support. 7Artisans publishes neither a launch date nor barrel dimensions, and retail listings disagree on both.

Voigtländer Ultron 27mm F2 X

7Artisans 7Artisans 35mm f/1.2 II

Sharp in the centre from f/2, with short focus falloff and clean specular highlights.
All-metal build, third-stop aperture clicks, and a focus tab with a hard infinity stop.
Ten straight blades give defined ten-point sunstars from around f/2.8.
Electronic contacts: EXIF, focus peaking and check, distance display, IBIS, X-Pro3 parallax correction.
25 cm minimum focus at a 40 mm-equivalent view — close enough for detail work.

f/1.2 for around the price of a filter, in an all-metal barrel.
Strong wide-open character: halation around highlights, swirling corners.
0.28 m minimum focus, closer than the original version managed.
Ten rounded blades keep the stopped-down rendering tidier than the price suggests.

No autofocus, and a short focus throw that compresses everything past a few metres.
Corners lag the XF 23mm F2 R WR wide open and only catch up around f/8.
No weather sealing on a lens people mount to sealed X-Pro and X-T bodies.
Post-2024 firmware on some Fuji bodies writes f/22 into EXIF instead of the set aperture.
Around $600 — roughly 1.5× Fujifilm's own autofocusing 27mm pancake.

No electronic contacts: no EXIF, no aperture recorded, no IBIS, no auto magnification.
f/1.2 and f/1.4 are effects, not working apertures — sharp from about f/4.
Heavy longitudinal colour fringing on high-contrast edges wide open.
Sample variation is the standing complaint about the category; no sealing, no real warranty support.
7Artisans publishes neither a launch date nor barrel dimensions, and retail listings disagree on both.

Pros and cons mirror the in-house Ultron 27mm F2 X review and 7Artisans 35mm f/1.2 II review.

Ultron 27mm F2 X vs 7Artisans 35mm f/1.2 II: full specs

Spec	Ultron 27mm F2 X 27 mm · f/2 · 120g	7Artisans 35mm f/1.2 II 35 mm · f/1.2 · 218g
Optical
Focal length	27 mm	35 mm
35mm equivalent	40 mm	52.5 mm
Maximum aperture	f/2	f/1.2
Minimum aperture	f/22	f/22
Optical construction	6 elements in 4 groups	6 elements in 5 groups
Special elements	1 extra-low-dispersion element, no aspherical glass	—
Aperture blades	10	10
Focus & Stabilization
Min. focus distance	0.25 m	0.28 m
Max. magnification	0.15×	—
Autofocus motor	Manual focus only	Manual focus only
Optical stabilization	No	No
Physical
Filter thread	43 mm	46 mm
Diameter × length	59.3 × 23.5 mm	—
Weight	120g	218g
Weather sealing	No	No
Min. operating temp	—	—
General
Announced	2023-05-15	Not published

Highlighted cells are best in class between these two. Specs sourced from the manufacturers' public product pages.

In-depth reviews

For the full long-form review of each lens, see the Voigtländer Ultron 27mm F2 X review and the 7Artisans 7Artisans 35mm f/1.2 II review. Each carries the full spec breakdown, pros and cons, and where the lens sits in the X-mount lineup.