Fujifilm Fujinon XT17sx45BRMK1 4.5-77mm f/1.6 HD ENG Lens Review

If you're hunting for a broadcast or ENG lens with a super fast constant aperture, the Fujinon XT17sx45BRMK1 4.5-77mm f/1.6 is a serious piece of glass. This is a professional HD lens built for run-and-gun video work, offering a 4.5-77mm zoom range and that killer f/1.6 aperture across the entire zoom. It's priced around $3500, which puts it in a specific professional category. People searching for a fast, versatile ENG lens for documentary or event work will find this on their radar, especially if low-light performance is a top priority.

This lens scores highest in versatility, landing in the 100th percentile, which makes sense given its wide-to-telephoto zoom range. The f/1.6 constant aperture is its star feature, sitting in the 81st percentile, meaning it lets in a ton of light compared to most zooms. That translates directly to being able to shoot in darker environments without cranking the ISO and introducing noise. The bokeh quality is also solid at the 72nd percentile, so your subject separation will look great. Just know that its autofocus and optical performance scores are more middle-of-the-pack, so it's built for manual focus pullers or situations where you can work with its AF quirks.

At $3500, this lens isn't for hobbyists. It's a tool for working videographers who need that specific combination of a fast, wide zoom for unpredictable shooting conditions. You're paying for the professional HD optics and that rare f/1.6 constant aperture in a zoom. If you don't absolutely need that speed, there are more affordable all-in-one zooms out there, but they won't match the low-light capability.

This lens occupies a unique niche. The Panasonic Lumix 14-140mm f/3.5-5.6 II is a consumer all-in-one zoom for Micro Four Thirds cameras; it's smaller and has stabilization, but its variable, slower aperture is no match for the Fujinon in low light. The Sony FE 24-240mm f/3.5-6.3 is similar—a tourist lens with a huge range but a slow, variable aperture. For Fuji X mount shooters looking for speed, the Viltrox 35mm f/1.7 or Meike 55mm f/1.8 are fantastic, cheap primes that are sharper and faster to focus, but they're fixed focal lengths. You buy the Fujinon zoom when you need both the flexibility of a zoom and the speed of a prime, and you're willing to trade some portability and autofocus performance for it.

Should you buy this? If you're a professional videographer or documentary shooter using a compatible camera system and your work constantly takes you into challenging, dimly lit environments where you need zoom flexibility, then yes, this lens is a very strong contender. That f/1.6 aperture is a genuine game-saver. But if you're a hybrid shooter, a vlogger, or someone who relies heavily on autofocus and stabilization, this lens will feel like a bulky, specialized tool that doesn't play to your strengths. For most people, a combination of fast primes and a standard zoom is a more practical and affordable kit.