What's the difference between the Fujifilm XF 27mm F2.8 R WR and the Voigtländer Ultron 27mm F2 X?

The XF 27mm F2.8 R WR leads on a lighter 84g body, a more compact 23 mm barrel, autofocus at all, where the Ultron 27mm F2 X is manual focus only. The Ultron 27mm F2 X leads on a brighter f/2 maximum aperture, closer 0.25 m focusing, higher 0.15× magnification.

Which is smaller, the Fujifilm XF 27mm F2.8 R WR or the Voigtländer Ultron 27mm F2 X?

The XF 27mm F2.8 R WR is the smaller, lighter lens at 84g and 23 mm long, versus 120g for the Ultron 27mm F2 X.

Which is faster, the Fujifilm XF 27mm F2.8 R WR or the Voigtländer Ultron 27mm F2 X?

The Ultron 27mm F2 X is the faster lens at f/2, against f/2.8 for the XF 27mm F2.8 R WR — brighter in low light and able to throw the background further out of focus.

Fujifilm XF 27mm F2.8 R WR vs Voigtländer Ultron 27mm F2 X: full comparison

The XF 27mm F2.8 R WR and Ultron 27mm F2 X trade blows evenly — the right pick comes down to focal length and what you shoot.

Read the full XF 27mm F2.8 R WR review →Read the full Ultron 27mm F2 X review →

The short version

The Fujifilm XF 27mm F2.8 R WR and Voigtländer Ultron 27mm F2 X are both 27mm X-mount primes covering the same field of view, which Fujifilm rounds to 41mm-equivalent and Voigtländer to 40mm. The Ultron 27mm F2 X is the newer design, from 2023.

On the spec sheet the XF 27mm F2.8 R WR pulls ahead with a lighter 84g body, a more compact 23 mm barrel, and autofocus at all, where the Ultron 27mm F2 X is manual focus only, plus a couple of smaller edges.

The Ultron 27mm F2 X answers with a brighter f/2 maximum aperture, closer 0.25 m focusing, and higher 0.15× magnification, and a few more besides.

So which one? If a lighter 84g body matters most, the XF 27mm F2.8 R WR is the pick. If a brighter f/2 maximum aperture is closer to what you need, the Ultron 27mm F2 X is the smarter buy. Same view either way — this comes down to the trade-offs above.

Where the XF 27mm F2.8 R WR wins

+a lighter 84g body
+a more compact 23 mm barrel
+autofocus at all, where the Ultron 27mm F2 X is manual focus only
+weather sealing

Where the Ultron 27mm F2 X wins

+a brighter f/2 maximum aperture
+closer 0.25 m focusing
+higher 0.15× magnification
+a 10-blade diaphragm

Who should buy the XF 27mm F2.8 R WR or Ultron 27mm F2 X?

Buy the XF 27mm F2.8 R WR if…

Pick the XF 27mm F2.8 R WR if a lighter 84g body and a more compact 23 mm barrel matter to you. Photographers for whom size is the deciding feature — the lightest Fuji kit, a jacket-pocket travel setup, or a discreet street camera that behaves like an X100. Read the full XF 27mm F2.8 R WR review for the details.

Buy the Ultron 27mm F2 X if…

Pick the Ultron 27mm F2 X if a brighter f/2 maximum aperture 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.

XF 27mm F2.8 R WR vs Ultron 27mm F2 X: pros and cons

Fujifilm XF 27mm F2.8 R WR	Voigtländer Ultron 27mm F2 X
Smallest autofocus lens Fujifilm makes — 84g, turns a small body into an X100-sized rig. Very sharp with rich colour and strong micro-contrast; excellent SOOC JPEGs. R WR update adds weather sealing and an aperture ring over the 2013 original. Beats the cheaper TTArtisan 27mm on corners, vignetting, and build.	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.
Autofocus is slow-ish and audible — the focus noise carries into in-camera video audio. f/2.8 is a stop slower than the Fujicron primes; 0.34 m minimum focus is the longest of them. 41 mm-equivalent is a divisive "no man's land" — optically fine, stylistically flat for some. Roughly 2.5× the price of the TTArtisan 27mm for a modest optical edge.	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.

Fujifilm XF 27mm F2.8 R WR

Voigtländer Ultron 27mm F2 X

Smallest autofocus lens Fujifilm makes — 84g, turns a small body into an X100-sized rig.
Very sharp with rich colour and strong micro-contrast; excellent SOOC JPEGs.
R WR update adds weather sealing and an aperture ring over the 2013 original.
Beats the cheaper TTArtisan 27mm on corners, vignetting, and build.

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.

Autofocus is slow-ish and audible — the focus noise carries into in-camera video audio.
f/2.8 is a stop slower than the Fujicron primes; 0.34 m minimum focus is the longest of them.
41 mm-equivalent is a divisive "no man's land" — optically fine, stylistically flat for some.
Roughly 2.5× the price of the TTArtisan 27mm for a modest optical edge.

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.

Pros and cons mirror the in-house XF 27mm F2.8 R WR review and Ultron 27mm F2 X review.

XF 27mm F2.8 R WR vs Ultron 27mm F2 X: full specs

Spec	XF 27mm F2.8 R WR 27 mm · f/2.8 · 84g	Ultron 27mm F2 X 27 mm · f/2 · 120g
Optical
Focal length	27 mm	27 mm
35mm equivalent	41 mm	40 mm
Maximum aperture	f/2.8	f/2
Minimum aperture	f/16	f/22
Optical construction	7 elements in 5 groups	6 elements in 4 groups
Special elements	1 aspherical element	1 extra-low-dispersion element, no aspherical glass
Aperture blades	7	10
Focus & Stabilization
Min. focus distance	0.34 m	0.25 m
Max. magnification	0.1×	0.15×
Autofocus motor	DC coreless motor	Manual focus only
Optical stabilization	No	No
Physical
Filter thread	39 mm	43 mm
Diameter × length	61.2 × 23 mm	59.3 × 23.5 mm
Weight	84g	120g
Weather sealing	Yes	No
Min. operating temp	-10 °C	—
General
Announced	2021-01-27	2023-05-15

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 Fujifilm XF 27mm F2.8 R WR review and the Voigtländer Ultron 27mm F2 X review. Each carries the full spec breakdown, pros and cons, and where the lens sits in the X-mount lineup.