Re: "Oh man, you are speaking my language. Japan..."

• I have been through three of these "do it all" zooms, and frankly, both previous suggestions miss the mark for actual travel. The 16-55mm is a tank that ruins the X-S20 balance, and the 16-80mm optics are just inconsistent. If you want a single lens that handles street and architecture without the bulk, look at the Fujifilm XF 16-50mm f/2.8-4.8 R LM WR. It is the newer kit lens and it is significantly sharper than the old 18-55mm. Alternatively, for a truly compact kit, the Fujifilm XF 18-55mm f/2.8-4 R LM OIS is fine, but if you really need reach and sharpness, the Sigma 18-50mm f/2.8 DC DN Contemporary is the best value. It is smaller, faster, and punches well above its weight.

Just catching up on this thread. Last year, I spent a month traversing Japan’s coast, and I realized quickly that chasing the perfect zoom range was ruining my experience. I eventually stopped fighting the urge for a massive heavy-duty lens and picked up the Fujifilm XF 10-24mm f/4 R OIS WR. While it is wider than what you were considering, it is an absolute game-changer for architecture and those tight, crowded street scenes in Tokyo. Because you are shooting with the X-S20, you have the benefit of in-body stabilization, which negates the need for the bulky f/2.8 constant zooms. The 10-24mm is compact enough that I carried it all day without fatigue, and the weather sealing held up perfectly during a downpour in Kanazawa. For street photography, the wide angle allows you to capture the scale of massive temple gates and narrow alleyways without having to constantly step back, which is often impossible in Japanese urban environments. The distortion control is impressive, keeping your architectural lines straight. If you want a single lens that forces you to be creative rather than lazy with a massive zoom, this is the one to pack. The takeaway: prioritize a wider field of view over extra reach for Japan; you will find that capturing the environment is more rewarding than zooming in on distant details.

Look, you’re overthinking the gear and missing the point of travel. If you’re worried about swapping glass in the rain, you need one solid build that doesn't quit. Listen, forget the kit lenses. You want the Fujifilm XF 16-55mm f/2.8 R LM WR. It’s a workhorse. Like a heavy-duty torque wrench, it just performs.

• Weather sealing: The 'WR' isn't just a label; it keeps the moisture out when you're stuck in a downpour.
• Sharpness: The optics are consistent across the frame. No soft corners like that 18-55mm toy.
• Aperture: Constant f/2.8 means you aren't fighting your ISO when the light drops in those narrow alleys. Yeah, it lacks OIS. So what? You’ve got steady hands or you don't. The X-S20 has IBIS anyway, so stop worrying about stabilization and just learn to hold the camera steady. The 16-80mm is too much plastic and not enough glass for what you’re paying, and the 18-120mm is for people who want to shoot movies, not photography. If you want a lens that won't fail you when you’re halfway across the world, this is the only one in the catalog worth the weight. Put it on, lock it down, and go shoot.

Rarely post but I have spent enough time in Japanese cities to know that bringing a massive zoom is a mistake. You are going to be walking ten to fifteen miles a day through crowded markets, narrow alleyways, and dense urban environments. A heavy, front-heavy lens will cause wrist fatigue within 48 hours and make you much less likely to pull the camera out for spontaneous shots. Avoid any lens that requires a tripod or relies entirely on heavy stabilization to compensate for a lack of aperture. You need a fast, weather-sealed prime or a very compact standard zoom that keeps the X-S20 ergonomic. The biggest mistake travelers make is prioritizing lens reach over portability; you will regret carrying a brick when you are trying to navigate a packed train or a humid temple interior. Stick to something lightweight that balances well with the X-S20 body. If you feel like you are missing the occasional long-distance shot, just use your feet to get closer. The image quality from a smaller, high-quality optic will always beat the utility of a larger lens that stays in your bag because it is too cumbersome to carry around all day.

^ This. Also, I just stumbled onto this thread and realized we’re all dancing around the same issue — everyone is obsessed with finding that one perfect piece of glass, but really, you're just trading one headache for another. We've talked about everything from massive f/2.8 bricks to those weather-sealed superzooms, and it’s clear that the X-S20 body is actually doing a lot of the heavy lifting. Personally, I'd say just go with something from the major third-party manufacturers. You really can't go wrong with their latest lineups; they’ve been killing it lately with color science and that snappy autofocus, and honestly, the build quality is often way better than you'd expect for the price. Just grab any high-end zoom from those guys and save yourself the stress of carrying a bag full of glass.

Oh man, you are speaking my language. Japan is basically the ultimate testing ground for gear, and honestly, if you're worried about the rain and want one lens to rule them all, stop looking at the heavy zooms. You need to pick up the Fujifilm XF 16-80mm f/4 R OIS WR. I know, I know—people love to bash it because it's not a constant f/2.8, but hear me out. When you're walking through the streets of Tokyo or hiking around a shrine in Kyoto, you don't want a brick hanging off your neck. The 16-80mm is weather-sealed—which is non-negotiable for Japan's humidity—and that OIS is actually a godsend for architecture shots when you're hand-holding at slower shutter speeds. I’ve shot with the Fujifilm XF 18-120mm f/4 LM PZ WR too, and while the power zoom is cool for video, it’s just too long and awkward for quick street snaps. The 16-80mm gives you that 16mm wide end, which is crucial for those cramped temple interiors. Is it as razor-sharp as a prime? Well, no, but it’s surprisingly crisp if you stop down just a hair. I’ve lugged mine all over the place and it’s never let me down. Don't sweat the sharpness charts—real-world performance is all about being ready for the shot, not changing lenses in a typhoon. Anyway, bottom line is, keep it simple and just go with the 16-80mm.

Would love to know this too

To add to the point above: you guys are missing the real value here. I’ve been crunching the numbers on my own gear habits for years—my wife says I’m obsessed, but hey, it saved me a ton for our last family trip. I picked up a used Fujifilm XF 18-135mm f/3.5-5.6 R LM OIS WR for a steal, and honestly, the versatility is unmatched. The dealer wanted $900 for a new setup, but I did it for $450 by scouring the forums and doing my own cleaning. My cost per mile on that lens is practically pennies now. I get the stress about the rain—I fixed my old weather-sealing gaskets myself with some silicone grease because the repair shop was charging $200 for a ten-minute job. It’s held up through three downpours in Seattle and a humid summer in Kyoto. Don't waste money on those heavy f/2.8 bricks if you aren't shooting professionally; that extra weight is just money burning a hole in your pocket for glass you don't need. TL;DR: Buy used, look for the 18-135mm, and DIY your gear maintenance. Quick tips:

• Always carry a cheap microfiber cloth in a ziplock bag; it’s a $2 solution that saves a $1,000 sensor.
• Use a wrist strap instead of a neck strap—less fatigue, costs $10 to make your own with paracord.

Honestly, everyone just parrots the same few zooms, but you should really just grab any high-quality weather-sealed constant aperture glass from a third-party manufacturer. They outperform the brand-name stuff anyway.

I feel your pain on this one—I've been wrestling with the exact same dilemma for my gear setup lately. Honestly, whatever you decide, just make sure you check your insurance policy before you head out. Don't risk taking anything expensive without verifying your coverage first. I'd recommend getting it professionally inspected for seal integrity if you're even slightly unsure. It is better to be safe than sorry when you are traveling.

So funny you ask this — last summer I spent three weeks wandering Kyoto and Tokyo with just a single, compact weather-sealed zoom attached to my body. I was terrified of rain, but honestly, it was liberating.

• Pack light to stay mobile in crowds.
• Prioritize weather sealing over aperture range.
• Don't sweat the sharpness charts. I just used whatever versatile weather-sealed lens was in my bag, and it made the whole trip so much better.