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Fujinon XF18-55mmF2.8-4 R LM OIS vs Viltrox AF 25mm F1.7 Air XF
Short answer
The Fujinon XF18-55mmF2.8-4 R LM OIS (18–55mm) and Viltrox AF 25mm F1.7 Air XF (25mm) are both standard lenses for the Fujifilm X mount. The Viltrox AF 25mm F1.7 Air XF is the faster lens at f/1.7 against f/2.8–4 on the Fujinon XF18-55mmF2.8-4 R LM OIS. Only the Fujinon XF18-55mmF2.8-4 R LM OIS has optical stabilisation and an aperture ring.
Viltrox AF 25mm F1.7 Air XF: 1 specs ahead
Side by side
| Fujinon XF18-55mmF2.8-4 R LM OIS | Viltrox AF 25mm F1.7 Air XF | |
|---|---|---|
| Brand | Fujifilm | Viltrox |
| Focal length | 18–55mm | 25mm |
| 35mm equivalent | 27–83mm | 38mm |
| Maximum aperture | f/2.8–4 | f/1.7 |
| Mount | Fujifilm X | Fujifilm X |
| Autofocus | Yes | Yes |
| Optical stabilisation | Yes | — |
| Weather resistant | No | — |
| Aperture ring | Yes | — |
| Macro | No | — |
| Linear motor | Yes | — |
| Minimum aperture | f/22 | — |
| Aperture blades | 7 | — |
| Lens construction | 14 elements in 10 groups | — |
| Special elements | 3 aspherical elements and 1 anomalous dispersion lens | — |
| Angle of view | 76.5° – 29° | — |
| Minimum focus | 0.3 m | — |
| Maximum magnification | 0.15× | — |
| Weight | 310 g | — |
| Diameter | ⌀65 mm | — |
| Length | 70.4–97.9 mm | — |
| Filter thread | ⌀58 mm | — |
Where each one is ahead
Reasons to choose the Fujinon XF18-55mmF2.8-4 R LM OIS
- Longer reach 83 mm vs 38 mm
- Wider view 27 mm vs 38 mm
Reasons to choose the Viltrox AF 25mm F1.7 Air XF
- Maximum aperture f/1.7 vs f/2.8–4
Framing and reach
| Lens | Frames like | Horizontal view | Frame width at 10 m |
|---|---|---|---|
| Fujinon XF18-55mmF2.8-4 R LM OIS | 27–83 mm | 66.3°–24.1° | 13.1–4.3 m |
| Viltrox AF 25mm F1.7 Air XF | 38 mm | 50.3° | 9.4 m |
The Fujinon XF18-55mmF2.8-4 R LM OIS gets 2.18× closer to the subject than the Viltrox AF 25mm F1.7 Air XF: whatever it points at fills 2.18× more of the frame edge to edge, or 4.8× more of its area. With the Viltrox AF 25mm F1.7 Air XF you would have to walk about 54% of the distance towards the subject to get the same picture — or crop it later, which leaves roughly 21% of the original pixels.
Angles and widths are calculated from focal length and sensor width, horizontally, on the native sensor of each mount.
What each one suits
| Fujinon XF18-55mmF2.8-4 R LM OIS | Viltrox AF 25mm F1.7 Air XF | |
|---|---|---|
| Birds and wildlife | Poor | Poor |
| Sports | Poor | Poor |
| Portrait | Average | Average |
| Travel | Excellent | Very good |
| Street | Very good | Very good |
| Weddings | Very good | Very good |
| Walk around | Excellent | Very good |
| Vlogging | Very good | Poor |
| Landscape | Good | Good |
| Macro | Poor | Poor |
Scored from the published specifications — focal length, aperture, stabilisation, weather sealing and weight. Sharpness, bokeh and rendering are not in a spec sheet and are not scored here.
Cameras that take both
Both lenses fit every interchangeable-lens X Series body — 34 in our list. Fixed-lens models such as the X100 series cannot take them.
Which one to choose
Choose the Fujinon XF18-55mmF2.8-4 R LM OIS if
- your subject is far away. It magnifies 2.18× more, and walking closer is not always an option.
- you want more in the frame. It starts at 27 mm equivalent, against 38 mm on the other lens — interiors, landscapes and groups at close range.
Choose the Viltrox AF 25mm F1.7 Air XF if
- low light is the priority. At f/1.7 it lets in 1.4 stops more than f/2.8–4 — faster shutter speeds indoors and softer backgrounds.
Everything above comes from published specifications. How sharp each lens is, how quickly it focuses and what its pictures look like are not in any spec sheet, so this comparison does not try to judge them.
Common questions
Which is better in low light, the Fujinon XF18-55mmF2.8-4 R LM OIS or the Viltrox AF 25mm F1.7 Air XF?
The Viltrox AF 25mm F1.7 Air XF. At f/1.7 against f/2.8–4 it gathers 1.4 stops more light, which matters without flash and for background blur. Stabilisation can offset some of that for still subjects, but not for moving ones.
Will both lenses fit my camera?
Both use the Fujifilm X mount, so they fit any X Series camera with interchangeable lenses. They do not fit fixed-lens models such as the X100 series or GFX bodies.
compare.faqTitle
Which is better, the Fujinon XF18-55mmF2.8-4 R LM OIS or the Viltrox AF 25mm F1.7 Air XF?
On measurable specs the Viltrox AF 25mm F1.7 Air XF leads, 1 wins against 0. That is a spec count, not a field test.
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Built from the specifications Fujifilm publishes.