The Fuji 23mm provides a focal length which exactly matches that of a 35mm optic in a 35mm full-frame system, making it a classic wide-angle prime lens. Plus in situations like travel, you can fit just about anything in the frame without a ton of distortion. It’s so nice when you can pop a photo into Lightroom and don’t need to mess with the perspective, such as the photo below: Budapest, Hungary during blue hour with the Fujifilm 23mm f2. Autofocus speed, accuracy, and silence Second, there is a fair bit of vignetting noticeable in mid-tone corner areas. Again, this was noticeable in the rear screen preview. I generally add a bit of vignetting to most photos, so this was not too much of an issue in my experience, and in the situations where it was, I framed a little wide, so I could crop out the vignette-affected area in Lightroom.

And yet this is not a small lens, and you might start to think that if you’re going to be working with prime lenses this size, you might just as well step up to a full frame system. Fujifilm’s appeal lies in its combination of size and performance. Performance on its own may not be enough. How we test lenses Autofocus is fast, and it's also perfectly accurate, especially at f/1.4. It's nearly instantaneous on my Fuji X-T1.As has become common, there’s a correction profile that’s applied automatically to Jpeg and raw files, but you can turn it off for the raw files when you’re processing them in software such as Adobe Camera Raw. Removing the profiles for the XF 23mm f1.4 R LM WR reveals that there’s slight barrel distortion, but if you allow the profile to do its job, straight lines look straight.

When used on the X-mount cameras with their 1.52x sensors, it sees the same angle of view as a 35mm lens sees when used on a 35mm camera. The Fujifilm XF 23mm F1.4 R LM WR doesn't exhibit any barrel distortion, as you can see in the photo below. Sunstars and Flare And then there’s the Fujifilm ‘clonk’ which is starting to look like a characteristic of these new primes, even if it is perfectly harmless. If you move the lens about while it’s off the camera you can feel and often hear an internal ‘clonk’. This stops when it’s attached to a camera and the camera is powered on, so we assume it’s simply caused by a floating AF group in the lens that’s not ‘parked’ when it’s off the camera. Would that bother you? You decide.

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I’ve always loved Fuji’s fast primes, so it was a surprise to me to warm up to this lens like I did. But it wasn’t immediate — I had to put it through its paces before it really earned a spot as my go-to lens. Fujifilm have paid close attention to this aspect of lens use, employing a 9-segment diaphragm with rounded blades for some very pleasing bokeh. The dedicated aperture ring is also mandatory for real photography, but absent on most other brands of lenses. In our view, their efforts have been successful for a moderate wide-angle prime lens - see the examples below to judge for yourself Sharpness Further good news is that focus breathing is controlled well and there’s only a very slight change to the framing when the focus shifts from infinity to the closest point.