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Fujinon XF14mmF2.8 R vs Viltrox AF 15mm F1.7 Air XF
Short answer
The Fujinon XF14mmF2.8 R (14mm) and Viltrox AF 15mm F1.7 Air XF (15mm) are both wide-angle lenses for the Fujifilm X mount. The Viltrox AF 15mm F1.7 Air XF is the faster lens at f/1.7 against f/2.8 on the Fujinon XF14mmF2.8 R. Only the Fujinon XF14mmF2.8 R has an aperture ring.
Viltrox AF 15mm F1.7 Air XF: 2 specs ahead
Side by side
| Fujinon XF14mmF2.8 R | Viltrox AF 15mm F1.7 Air XF | |
|---|---|---|
| Brand | Fujifilm | Viltrox |
| Focal length | 14mm | 15mm |
| 35mm equivalent | 21mm | 23mm |
| Maximum aperture | f/2.8 | f/1.7 |
| Mount | Fujifilm X | Fujifilm X |
| Autofocus | Yes | Yes |
| Optical stabilisation | No | — |
| Weather resistant | No | — |
| Aperture ring | Yes | — |
| Macro | No | — |
| Linear motor | No | — |
| Minimum aperture | f/22 | — |
| Aperture blades | 7 | — |
| Lens construction | — | 12 elements in 10 groups |
| Angle of view | 90.8° | — |
| Minimum focus | 0.18 m | — |
| Maximum magnification | 0.12× | — |
| Weight | 235 g | 180 g |
| Diameter | ⌀65 mm | — |
| Length | 58.4 mm | — |
| Filter thread | ⌀58 mm | ⌀58 mm |
| Launch price | — | $239 |
Where each one is ahead
Reasons to choose the Fujinon XF14mmF2.8 R
- Wider view 21 mm vs 23 mm
Reasons to choose the Viltrox AF 15mm F1.7 Air XF
- Longer reach 23 mm vs 21 mm
- Maximum aperture f/1.7 vs f/2.8
- Weight 180 g vs 235 g
Framing and reach
| Lens | Frames like | Horizontal view | Frame width at 10 m |
|---|---|---|---|
| Fujinon XF14mmF2.8 R | 21 mm | 80° | 16.8 m |
| Viltrox AF 15mm F1.7 Air XF | 23 mm | 76.1° | 15.7 m |
The Viltrox AF 15mm F1.7 Air XF gets 1.1× closer to the subject than the Fujinon XF14mmF2.8 R: whatever it points at fills 1.1× more of the frame edge to edge, or 1.2× more of its area. With the Fujinon XF14mmF2.8 R you would have to walk about 9% of the distance towards the subject to get the same picture — or crop it later, which leaves roughly 83% of the original pixels.
Angles and widths are calculated from focal length and sensor width, horizontally, on the native sensor of each mount.
Size and weight
- The Viltrox AF 15mm F1.7 Air XF is 55 g lighter than the Fujinon XF14mmF2.8 R, about 23% less.
- Both take ⌀58 mm filters, so one set of filters fits both.
What each one suits
| Fujinon XF14mmF2.8 R | Viltrox AF 15mm F1.7 Air XF | |
|---|---|---|
| Birds and wildlife | Poor | Poor |
| Sports | Poor | Poor |
| Portrait | Poor | Poor |
| Travel | Very good | Very good |
| Street | Very good | Excellent |
| Weddings | Good | Very good |
| Walk around | Good | Very good |
| Vlogging | Very good | Very good |
| 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 XF14mmF2.8 R if
- you want more in the frame. It starts at 21 mm equivalent, against 23 mm on the other lens — interiors, landscapes and groups at close range.
Choose the Viltrox AF 15mm 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 — faster shutter speeds indoors and softer backgrounds.
- weight matters to you. It is 55 g lighter, roughly 23% less to carry.
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 lighter, the Fujinon XF14mmF2.8 R or the Viltrox AF 15mm F1.7 Air XF?
The Viltrox AF 15mm F1.7 Air XF, by 55 g — about 23% less.
Which is better in low light, the Fujinon XF14mmF2.8 R or the Viltrox AF 15mm F1.7 Air XF?
The Viltrox AF 15mm F1.7 Air XF. At f/1.7 against f/2.8 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.
Do the Fujinon XF14mmF2.8 R and Viltrox AF 15mm F1.7 Air XF use the same filters?
Yes. Both take ⌀58 mm screw-in filters.
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 one is lighter?
The Viltrox AF 15mm F1.7 Air XF, by 55 g (180 g against 235 g).
Which is better, the Fujinon XF14mmF2.8 R or the Viltrox AF 15mm F1.7 Air XF?
On measurable specs the Viltrox AF 15mm F1.7 Air XF leads, 2 wins against 0. That is a spec count, not a field test.
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Built from the specifications Fujifilm publishes.