Fujifilm GF 45-100mm f/4 R LM WR

With autofocus in the 98th percentile, this is one of the fastest-focusing medium format zooms we've seen. The 5-stop stabilization is equally impressive, making handheld shooting a breeze. Just don't expect shallow depth of field from the slow f/4 aperture, which ranks near the bottom of our database.

This is where the 45-100mm earns its keep. The autofocus is a standout, driven by a linear motor that's both quick and quiet. We're talking about a lens that can keep up with the GFX100's demanding sensor without breaking a sweat. The optical stabilization is equally impressive, reliably giving you that 5-stop advantage. In practice, this combo means you can shoot handheld at slower shutter speeds in fading light and still get pixel-level sharpness. The 16-element optical formula, with its 3 aspherical and 2 ED elements, keeps aberrations in check, placing it in the 87th percentile for overall optical quality.

The 45-100mm range on a medium format sensor is incredibly versatile, roughly equivalent to a 36-79mm on full-frame. It covers your standard wide to short-telephoto needs in one go. Minimum focus is 650mm, which isn't close, and the 0.13x magnification puts macro capabilities in a disappointing 31st percentile. This is not a lens for detail shots of small subjects. But for everything from sweeping landscapes to tightly framed environmental portraits, the resolving power is there. It's one of the best zooms in the GFX lineup for pure image quality.

Stacked against the competition, the GF 45-100mm is in a weird spot. It's a medium format lens, so comparing it to the Sigma 18-50mm f/2.8 or Tamron 17-70mm f/2.8 for APS-C is a bit apples-to-oranges. Those lenses are faster and lighter but can't touch the sheer resolving power needed for a GFX sensor. The Nikon Z 17-28mm f/2.8 is a stellar full-frame wide zoom, but it's not in the same focal range or format class. The real trade-off here is aperture for image quality. You give up the shallow depth of field of an f/2.8 zoom to get the best sharpness and stabilization in the GFX system. If you need speed, this isn't your lens. If you need ultimate detail in a single, rugged package, it's hard to beat.

Pricing on this lens is all over the map, with a spread from $2,292 to a frankly absurd $475,841 across vendors. Obviously, you should ignore the outlier and focus on the lower end of that range. For around $2,300, you're getting a professional-grade, weather-sealed zoom with top-tier stabilization and autofocus for a medium format system. That's a solid price-to-performance ratio, especially when you consider the resolving power it brings to a 100MP sensor. Just shop smart and don't get hosed by a weird listing.

The Fujifilm GF 45-100mm f/4 is a lens that does one thing absurdly well: it's sharp. Like, 'top of the charts' sharp. In our database, its autofocus performance lands in the 98th percentile and its stabilization isn't far behind at the 97th. That means you're getting a medium format zoom that locks on fast and lets you handhold shots you'd normally need a tripod for. The 5-stop OIS is the real deal, and the linear motor is near-silent, which is a blessing for anyone shooting video or trying not to spook wildlife.

But let's be real about what this lens isn't. With a constant f/4 aperture, it's sitting in the 5th percentile for speed. That's a tough pill to swallow if you're dreaming of creamy, blown-out backgrounds. The bokeh quality ranks even lower, in the 7th percentile, so portrait shooters looking for that 3D-pop might feel a bit let down. At 1005g, it's not a featherweight either, but it balances nicely on GFX bodies. It's a workhorse, not a show pony.

Portrait photographers obsessed with bokeh should look elsewhere. The f/4 aperture and 7th-percentile bokeh rating mean you won't get that creamy, dreamy background separation. Macro shooters will also be frustrated by the 650mm minimum focus distance. And if you're trying to keep your kit light for long hikes, the 1005g weight is a real consideration. This lens is for shooters who value absolute sharpness and reliability above all else.

The GF 45-100mm f/4 is the lens you get when you're done messing around. It's not about bokeh or low-light speed; it's about capturing the most detailed file possible, every single time. The autofocus and stabilization are so good they almost make you forget you're shooting medium format. Almost. The f/4 aperture is a compromise, and the bokeh is nothing to write home about, but owners don't seem to care. They call it a perfect workhorse, and the data backs that up. If you're a GFX shooter who prioritizes sharpness and reliability over shallow depth of field, this is a no-brainer.