What's the difference between the Voigtländer Ultron 27mm F2 X and the Fujifilm XF 33mm F1.4 R LM WR?

The Ultron 27mm F2 X leads on a lighter 120g body, a more compact 23.5 mm barrel, closer 0.25 m focusing. The XF 33mm F1.4 R LM WR leads on a brighter f/1.4 maximum aperture, autofocus at all, where the Ultron 27mm F2 X is manual focus only, weather sealing.

Which is smaller, the Voigtländer Ultron 27mm F2 X or the Fujifilm XF 33mm F1.4 R LM WR?

The Ultron 27mm F2 X is the smaller, lighter lens at 120g and 23.5 mm long, versus 360g for the XF 33mm F1.4 R LM WR.

Which is faster, the Voigtländer Ultron 27mm F2 X or the Fujifilm XF 33mm F1.4 R LM WR?

The XF 33mm F1.4 R LM WR is the faster lens at f/1.4, 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 Fujifilm XF 33mm F1.4 R LM WR: full comparison

The Ultron 27mm F2 X leads on more of the measurable specs, but the XF 33mm F1.4 R LM WR counters on a brighter f/1.4 maximum aperture and autofocus at all, where the Ultron 27mm F2 X is manual focus only.

Read the full Ultron 27mm F2 X review →Read the full XF 33mm F1.4 R LM WR review →

The short version

The Voigtländer Ultron 27mm F2 X and Fujifilm XF 33mm F1.4 R LM WR are two X-mount primes at different focal lengths — the Ultron 27mm F2 X (40mm equivalent) and the XF 33mm F1.4 R LM WR (50mm 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, plus a couple of smaller edges.

The XF 33mm F1.4 R LM WR answers with a brighter f/1.4 maximum aperture, autofocus at all, where the Ultron 27mm F2 X is manual focus only, and weather sealing.

So which one? Start with the focal length you actually want to shoot: the 40mm-equivalent Ultron 27mm F2 X or the 50mm-equivalent XF 33mm F1.4 R LM WR. 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
+a 10-blade diaphragm

Where the XF 33mm F1.4 R LM WR wins

+a brighter f/1.4 maximum aperture
+autofocus at all, where the Ultron 27mm F2 X is manual focus only
+weather sealing

Who should buy the Ultron 27mm F2 X or XF 33mm F1.4 R LM WR?

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 XF 33mm F1.4 R LM WR if…

Pick the XF 33mm F1.4 R LM WR if a brighter f/1.4 maximum aperture and autofocus at all, where the Ultron 27mm F2 X is manual focus only matter to you. Photographers who want one current normal prime on the camera most of the time, and who need the autofocus to keep up with people who move. Read the full XF 33mm F1.4 R LM WR review for the details.

Ultron 27mm F2 X vs XF 33mm F1.4 R LM WR: pros and cons

Voigtländer Ultron 27mm F2 X	Fujifilm XF 33mm F1.4 R LM WR
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.	Sharp across the frame from f/1.4, including on the 40 MP sensors. Linear-motor autofocus is quiet, quick, and keeps up with subject detection. 0.3 m minimum focus for a 0.15x magnification — close enough for detail work. Weather sealed, rated to -10 °C, with a clicked and engraved aperture ring.
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.	360g and 73.5 mm makes it front-heavy on the small rangefinder bodies. Owners who like the older XF 35mm F1.4 R rendering often find this one clinical. The Viltrox AF 33mm f/1.4 XF covers the same focal length for roughly a third of the price. 58 mm filter thread shares nothing with the 43 mm f/2 primes.

Voigtländer Ultron 27mm F2 X

Fujifilm XF 33mm F1.4 R LM WR

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.

Sharp across the frame from f/1.4, including on the 40 MP sensors.
Linear-motor autofocus is quiet, quick, and keeps up with subject detection.
0.3 m minimum focus for a 0.15x magnification — close enough for detail work.
Weather sealed, rated to -10 °C, with a clicked and engraved aperture ring.

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.

360g and 73.5 mm makes it front-heavy on the small rangefinder bodies.
Owners who like the older XF 35mm F1.4 R rendering often find this one clinical.
The Viltrox AF 33mm f/1.4 XF covers the same focal length for roughly a third of the price.
58 mm filter thread shares nothing with the 43 mm f/2 primes.

Pros and cons mirror the in-house Ultron 27mm F2 X review and XF 33mm F1.4 R LM WR review.

Ultron 27mm F2 X vs XF 33mm F1.4 R LM WR: full specs

Spec	Ultron 27mm F2 X 27 mm · f/2 · 120g	XF 33mm F1.4 R LM WR 33 mm · f/1.4 · 360g
Optical
Focal length	27 mm	33 mm
35mm equivalent	40 mm	50 mm
Maximum aperture	f/2	f/1.4
Minimum aperture	f/22	f/16
Optical construction	6 elements in 4 groups	15 elements in 10 groups
Special elements	1 extra-low-dispersion element, no aspherical glass	2 aspherical elements and 3 extra-low-dispersion elements
Aperture blades	10	9
Focus & Stabilization
Min. focus distance	0.25 m	0.30 m
Max. magnification	0.15×	0.15×
Autofocus motor	Manual focus only	Linear motor
Optical stabilization	No	No
Physical
Filter thread	43 mm	58 mm
Diameter × length	59.3 × 23.5 mm	67 × 73.5 mm
Weight	120g	360g
Weather sealing	No	Yes
Min. operating temp	—	-10 °C
General
Announced	2023-05-15	2021-09-02

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 Fujifilm XF 33mm F1.4 R LM WR review. Each carries the full spec breakdown, pros and cons, and where the lens sits in the X-mount lineup.