2 weeks ago
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Choosing a wide angle prime for a Fujifilm X mount body gets complicated fast, especially once you start weighing image quality against price. The Viltrox 15mm f/1.7 sits at $239, which isn't rock-bottom, but it's close enough to make you wonder whether it can actually hold up.
Coming to you from Christopher Frost, this detailed video puts the Viltrox 15mm f/1.7 through its paces on a Fujifilm X mount body with a 40-megapixel sensor, which is about as demanding a test as you can run on an APS-C lens at this price point. Frost had already reviewed this lens on Sony E and Nikon Z mount bodies and came away impressed, but this time he wanted to stress-test it. The 15mm focal length gives you a full frame equivalent of roughly 23mm, wide enough to give your shots some punch, and that f/1.7 aperture is genuinely useful for low-light shooting or pulling a subject away from a busy background. Build quality is straightforward: plastic body, metal mount, a USB-C port for firmware updates, and no weather-sealing.
Where things get interesting is the image quality breakdown. In the center of the frame at f/1.7, sharpness is decent but never quite razor sharp on a 40-megapixel sensor. Stop down to f/2.8 or f/4 and the center gets genuinely good, while the corners improve noticeably. By f/5.6, the lens is sharp corner to corner. Vignetting is a more persistent problem. Even shooting Raw and bypassing in-camera corrections, the corners are very dark at f/1.7, and Frost notes the issue lingers through f/4 and even f/5.6. Distortion, on the other hand, is well-controlled for a lens of this type, with only a slight wavy pattern to straight lines that rarely shows up in real-world shots.
Coma performance at f/1.7 is surprisingly clean, with only a hint of smearing on bright points of light, and stopping down to f/2.8 eliminates it entirely. Flare and glare are present when shooting into bright lights but stay transparent enough that they don't wreck a shot. Chromatic aberration hangs around through f/4 before clearing up at f/5.6. Bokeh is a genuine strength here, with out-of-focus backgrounds looking smooth in almost every situation Frost tests. The minimum focus distance of just 20 cm opens up some creative close-focus options that are genuinely fun to work with, though contrast and color fringing at f/1.7 mean you'll want to stop down to f/2.8 to get clean results there. Frost also flags that the low focus breathing could be a real asset for video work, something worth knowing if you shoot both stills and video.
The honest takeaway is that a 40-megapixel sensor is pushing this lens close to its limit. On a 26-megapixel Fujifilm body, this lens performs without issue, and even on the more demanding sensor, it still earns a recommendation given the price. Check out the video above for the full rundown from Frost.
English (US) ·