What's the difference between the Voigtländer Ultron 27mm F2 X and the Voigtländer Nokton 35mm F1.2 X?

The Ultron 27mm F2 X leads on a lighter 120g body, a more compact 23.5 mm barrel, closer 0.25 m focusing. The Nokton 35mm F1.2 X leads on a brighter f/1.2 maximum aperture, a 12-blade diaphragm.

Which is smaller, the Voigtländer Ultron 27mm F2 X or the Voigtländer Nokton 35mm F1.2 X?

The Ultron 27mm F2 X is the smaller, lighter lens at 120g and 23.5 mm long, versus 196g for the Nokton 35mm F1.2 X.

Which is faster, the Voigtländer Ultron 27mm F2 X or the Voigtländer Nokton 35mm F1.2 X?

The Nokton 35mm F1.2 X 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 Voigtländer Nokton 35mm F1.2 X: full comparison

The Ultron 27mm F2 X leads on more of the measurable specs, but the Nokton 35mm F1.2 X counters on a brighter f/1.2 maximum aperture and a 12-blade diaphragm.

Read the full Ultron 27mm F2 X review →Read the full Nokton 35mm F1.2 X review →

The short version

The Voigtländer Ultron 27mm F2 X and Voigtländer Nokton 35mm F1.2 X are two X-mount primes at different focal lengths — the Ultron 27mm F2 X (40mm equivalent) and the Nokton 35mm F1.2 X (52.5mm equivalent). The Ultron 27mm F2 X is the newer design, from 2023.

On the spec sheet the Ultron 27mm F2 X pulls ahead with a lighter 120g body, a more compact 23.5 mm barrel, and closer 0.25 m focusing.

The Nokton 35mm F1.2 X answers with a brighter f/1.2 maximum aperture and a 12-blade diaphragm.

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 Nokton 35mm F1.2 X. 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
+a more compact 23.5 mm barrel
+closer 0.25 m focusing

Where the Nokton 35mm F1.2 X wins

+a brighter f/1.2 maximum aperture
+a 12-blade diaphragm

Who should buy the Ultron 27mm F2 X or Nokton 35mm F1.2 X?

Buy the Ultron 27mm F2 X if…

Pick the Ultron 27mm F2 X if a lighter 120g body and a more compact 23.5 mm barrel 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 Nokton 35mm F1.2 X if…

Pick the Nokton 35mm F1.2 X if a brighter f/1.2 maximum aperture and a 12-blade diaphragm matter to you. Photographers who already enjoy manual focus and want the fastest, most tactile normal prime in the mount, particularly on an X-Pro body. Read the full Nokton 35mm F1.2 X review for the details.

Ultron 27mm F2 X vs Nokton 35mm F1.2 X: pros and cons

Voigtländer Ultron 27mm F2 X	Voigtländer Nokton 35mm F1.2 X
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 at a 52.5 mm-equivalent view — no native X-mount prime is this fast here. Twelve rounded blades keep specular highlights circular through the middle apertures. Machined metal, third-stop aperture clicks, mechanically coupled focus with a hard infinity stop. Electronic contacts: real EXIF, focus peaking, IBIS, X-Pro3 parallax correction. 196g and 39.8 mm long, so the speed does not cost you a large barrel.
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.	Manual focus only, at f/1.2 and 0.30 m, where depth of field is millimetres. Low contrast and spherical-aberration glow wide open; sharp from about f/2. Voigtländer's body compatibility list stops around the X-E4 and X-T30 II generation. No weather sealing, and around 649 EUR — more than a used XF 35mm F1.4 R.

Voigtländer Ultron 27mm F2 X

Voigtländer Nokton 35mm F1.2 X

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 at a 52.5 mm-equivalent view — no native X-mount prime is this fast here.
Twelve rounded blades keep specular highlights circular through the middle apertures.
Machined metal, third-stop aperture clicks, mechanically coupled focus with a hard infinity stop.
Electronic contacts: real EXIF, focus peaking, IBIS, X-Pro3 parallax correction.
196g and 39.8 mm long, so the speed does not cost you a large barrel.

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.

Manual focus only, at f/1.2 and 0.30 m, where depth of field is millimetres.
Low contrast and spherical-aberration glow wide open; sharp from about f/2.
Voigtländer's body compatibility list stops around the X-E4 and X-T30 II generation.
No weather sealing, and around 649 EUR — more than a used XF 35mm F1.4 R.

Pros and cons mirror the in-house Ultron 27mm F2 X review and Nokton 35mm F1.2 X review.

Ultron 27mm F2 X vs Nokton 35mm F1.2 X: full specs

Spec	Ultron 27mm F2 X 27 mm · f/2 · 120g	Nokton 35mm F1.2 X 35 mm · f/1.2 · 196g
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/16
Optical construction	6 elements in 4 groups	8 elements in 6 groups
Special elements	1 extra-low-dispersion element, no aspherical glass	1 abnormal partial dispersion element
Aperture blades	10	12
Focus & Stabilization
Min. focus distance	0.25 m	0.30 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	59.6 × 39.8 mm
Weight	120g	196g
Weather sealing	No	No
Min. operating temp	—	—
General
Announced	2023-05-15	2021-07-15

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 Voigtländer Nokton 35mm F1.2 X review. Each carries the full spec breakdown, pros and cons, and where the lens sits in the X-mount lineup.