Hook: The Iceland Tax
I shot a short film in Iceland on a Fujifilm X-H2S with a 6-stop filter sitting in a drawer back in Victoria.
I packed light on purpose. Camera, two lenses, one tripod, no filter case. On the third morning the light came down flat and silver over a black sand stretch and I had exactly the shot I’d flown eight time zones for, and no way to hold it. So I did what everyone does when they’re short a filter: I stopped down to f/16 and pushed the shutter to something respectable-looking, and I told myself it would be fine.
It was not fine. The motion blur I’d built the sequence around was gone, replaced by that stuttering, slightly panicked look you get at 1/500s. And past f/11 the sensor started giving away fine detail to diffraction — not ruined, just soft in a way that shows up later on a big screen when it’s too late to do anything about it.
The film cut together. It just wasn’t the film I went there to shoot.
I now carry two fixed filters and a set of rings. Here’s what to buy, what to skip, and the math that makes the decision for you.
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The best ND filter kit for travel is a 6-stop (ND64) and a 3-stop (ND8) — separately, or stacked to nine stops. The 6-stop covers stills in hard sun and video in shade. Stack both for wide-open 180-degree video at high noon. Buy one thread size and use step-up rings. Skip variable NDs unless you shoot solo run-and-gun.
What's the Best ND Filter Kit for Travel?
Two fixed filters: a 6-stop and a 3-stop, bought in your largest lens thread. Alone, each covers the light the other can't. Together they reach nine stops, which is what hard-sun video actually needs. If you're buying one thing tonight, buy the 6-stop.
| Filter | Stops | Alone, It's For | Stacked, It's For | What It Costs You When You Get It Wrong |
|---|---|---|---|---|
| K&F Concept Nano-X ND64 | 6 | Stills in hard sun; video in shade or overcast | 9 stops with the 3-stop — wide-open video at high noon | You fight your shutter for a week |
| Tiffen 0.9 | 3 | Fast-glass stills at the shutter ceiling; golden hour at low ISO; bright window-lit interiors | 9 stops with the 6-stop | You expect it to solve noon, and it doesn't |
| K&F Concept Variable ND2–ND32 | 1–5 | Solo run-and-gun in moderate light | — | An X-pattern eats a sky you can't recover |
| Breakthrough X4 ND1000 | 10 | 30-second-plus exposures | — | You expose wrong and blame the glass |
| Step-up ring set | — | Owning more than one lens | — | You buy the same filter three times |
Prices move constantly and vary by thread size. Check current pricing before you commit.
Which Filters Earn a Place in the Bag?
The 6-stop is the one that pays rent. The 3-stop is the one that makes it a system. The variable ND is a compromise you accept, not a filter you aspire to. Everything below is gear I’ve used on real shoots — except the Breakthrough, which I’m recommending on specs, not field time.
The Budget Reality: A $15 step-up ring set plus one filter is usually cheaper than buying that same filter in three sizes — and cheaper than one decent variable ND. If money is tight, buy the ring set first. It’s the cheapest decision in this entire article.
K&F Concept Nano-X ND64 (6-stop)
Best for: stills in hard sun, and video in shade or overcast where six stops lands you at a workable aperture.
Honest drawback: six stops is dark enough to starve contrast-detect autofocus on older bodies. Lock focus before you mount it.
Who should NOT buy this: anyone whose travel is mostly night streets, dark interiors, or golden hour at low ISO. You will carry it for a week and never thread it on.
Real production use case: the plaza, the coastline, the waterfall at roughly 1/4 to 1 second in bright sun — longer in overcast. The shot that wants a tripod and a filter and nothing else.
Compatibility notes: threaded, so it takes standard step-up rings. Order your largest lens diameter first and let the rings do the rest.
Budget alternative: buy this and the rings first, and add the 3-stop later. It’s the one filter that stands on its own.
Tiffen 0.9 (3-stop)
Best for: fast-glass stills where an f/1.2–1.4 lens is hitting the shutter ceiling, golden hour at low ISO, bright window-lit interiors, flash-sync work — and stacking onto the 6-stop for hard-sun video.
Honest drawback: on its own, it does not hold a wide-open 180-degree shutter in daylight on a video body sitting at ISO 800. That’s not the filter’s fault; it’s the arithmetic.
Who should NOT buy this as their only filter: anyone shooting daylight video on a log-profile body. You need the 6-stop first, or both.
Real production use case: stacked on the ND64 to reach nine stops — f/2.8 at 1/50s in full sun, which is the shot the 6-stop alone can’t get.
Compatibility notes: stacking two filters vignettes wide glass. When stacked, keep to roughly 35mm full-frame equivalent and longer, and skip the hood.
Budget alternative: this is the budget alternative for low-ISO shooters. If you live in open shade and late afternoon at ISO 100, it may be the only filter you need.
K&F Concept Variable ND2–ND32
Best for: solo run-and-gun video where you can’t swap glass between setups, in moderate light.
Honest drawback: cross-polarization. Push past the safe zone and you get an X burned into the frame that no grade removes cleanly. It also tops out at five stops, which the math below shows isn’t enough for noon exteriors.
Who should NOT buy this: stills shooters, anyone on ultra-wide glass, anyone shooting narrative with controlled lighting and time to change filters.
Real production use case: documentary and travel video in light that won’t sit still.
Compatibility notes: check whether the front thread takes your lens hood. Most don’t play nicely with wide hoods.
Budget alternative: a 3-stop fixed filter and the willingness to change it.
Breakthrough Photography X4 ND1000 (10-stop)
Best for: 30-second-plus exposures and emptying a landmark that will not empty itself.
Honest drawback: it needs a tripod, a remote trigger, and someone who can do stop math without a phone. It is a specialist tool with a specialist failure mode. I’m recommending this on specs, not on field time — treat it as a reference point, not a review.
Who should NOT buy this: anyone who hasn’t already mastered the 6-stop. You’ll expose wrong and conclude the filter is broken.
Real production use case: midday long exposure on a schedule you don’t control.
Compatibility notes: ten stops will overwhelm most metering. Shoot manual.
Budget alternative: I haven’t tested the cheaper options; verify the stated transmission before you buy one.
Why Carry Both If One Is Supposed to Be Enough?
Because neither filter does the other’s job, and stacked they reach nine stops — exactly what wide-open 180-degree video at high noon requires on a body sitting at ISO 800. The 6-stop is the moderate-light video filter. The 3-stop is the low-ISO filter: golden hour, bright window-lit interiors, and fast glass at the shutter ceiling.
That’s the whole system, and it’s why “just buy a 6-stop” advice falls apart for anyone shooting daylight exteriors on a log-profile camera. Six stops gets you a stills filter and a shade filter. It doesn’t get you f/2.8 at 1/50s in full sun on an ISO 800 body. Nine does. The derivation is in the next section, and it’s worth reading once because it decides what you carry.
At 24fps, the 180-degree rule puts you at 1/50s, and 1/50s is where natural motion blur lives. But 1/50s in daylight puts you at f/16 or beyond, which flattens your depth of field and walks you toward diffraction. The filters buy back the aperture. That’s the argument for both of them, and it applies just as much on the fast fifty most of us actually own.
How Many Stops Do You Actually Need?
Three stops is a low-ISO filter, six is a shade-and-stills filter, and nine — both stacked — is the hard-sun video filter. Ten stops is for thirty seconds and beyond. Each stop halves the light, so each stop doubles the time; if the exposure fundamentals are still fuzzy, start with the cinematography guide.
| Base Shutter | +3 Stops (ND8) | +6 Stops (ND64) | +10 Stops (ND1000) |
|---|---|---|---|
| 1/1000 | 1/125 | 1/15 | ~1 sec |
| 1/500 | 1/60 | 1/8 | ~2 sec |
| 1/250 | 1/30 | 1/4 | ~4 sec |
| 1/125 | 1/15 | 1/2 | ~8 sec |
Read that as a shopping decision. The 3-stop column is mostly handholdable, except the 1/15 cell, which wants a tripod or very steady hands. The 6-stop column wants a tripod and gives you water and cloud drag. The 10-stop column is where people disappear from your frame and you need patience, a remote, and a plan.
Then there's the part the tables never show. At ISO 100, f/2.8, in full sun, holding 1/50s takes about six stops. At ISO 800 — the base for log profiles on many video bodies — the same shot takes about nine. That single ISO jump is the reason the kit is two filters instead of one, and it's the reason a five-stop variable ND can't solve a noon exterior.
One honesty note: filters are manufactured to a tolerance, not a promise. A "6-stop" is roughly six stops. Take one test frame, check the histogram, and adjust. I do this on glass I've owned for years.
Do You Need a Variable ND?
For stills, no. For video, sometimes — and only in moderate light, because it tops out at five stops.It’s the one piece of glass in the travel filmmaking kit where the marketing consistently outruns the reality. A variable ND is two polarizers stacked, and as you rotate toward maximum density the two films approach cross-polarization. Push far enough and you get the X.
I learned this on a run-and-gun shoot at peak midday sun. I was holding 1/50s, the light was climbing, and I kept rotating to protect my aperture. I went past the safe limit. The sky in several takes came back with a visible cross through it. I cropped in and spent an hour nursing micro-contrast in post to make it survivable.
It’s the least glamorous kind of mistake, because the footage technically exists.
Now I mark my variable ND barrels with a dab of nail polish at the rotation point where the X first appears in my own test, then stay a stop inside it. A paint mark is cheaper than a reshoot.
The Production Reality: A variable ND is a convenience tool that fails quietly. It doesn’t stop working; it just starts doing something you didn’t ask for, in the corner of a frame you’re not watching. If you shoot on a schedule, that’s a bad trade. If you shoot alone with no time to swap glass, it’s the only trade available.
The stop count is the other half of it. Five stops is not nine, and the numbers above are why I still carry fixed glass for hard sun.
What Size Filter Should You Buy?
Buy for your largest lens diameter and use step-up rings for everything smaller. A ring set costs roughly $15 and replaces hundreds of dollars of duplicate filters. This is the single highest-leverage decision in the whole kit — and the stacking problem gets worse the wider you go, which is why wide-angle glass is where filter thickness and ring depth start to actually matter.
| Your Lens Thread | Ring Needed (77mm Filter) |
|---|---|
| 77mm | — direct fit |
| 72mm | 72→77 |
| 67mm | 67→77 |
| 58mm | 58→77 |
| 52mm | 52→77 |
If your largest lens is 82mm, swap the target size. Same logic, one filter, rings for everything else.
Two things the ring guides won't tell you.
Stepping up is optically safe. A larger filter in front of a smaller lens cannot vignette the image circle — that's not how optics work. The annoyances are mechanical: your lens hood stops fitting, the rig gets front-heavy and looks slightly ridiculous on a compact body, and cheap aluminum rings can bind onto threads and require a filter wrench and some swearing.
Stacking is the real vignette problem. Two filters deep on anything wider than about 35mm full-frame equivalent is how you get dark corners. If you shoot 24–28mm, test your corners with slim frames before you trust it. An ND plus a polarizer is worse than two NDs.
The Common Beginner Mistake: Buying the same filter in three thread sizes. I did exactly this — separate 58mm, 67mm, and 77mm NDs for different lenses — before doing the arithmetic and feeling like an idiot. One 77mm filter and a ring set covers every lens I own for less than two of those three filters cost. Buy the biggest size first.
How Do You Use an ND Without Wrecking the Frame?
Compose and focus first, then mount the filter, then meter. Strong ND glass cuts light to the point where autofocus hunts, and the hunting is what convinces people their filter is soft. It usually isn’t. It’s out of focus. If you’re running solo, the same single-operator habits apply to every setup, filter or not.
The order matters:
Frame and compose with nothing on the lens.
Acquire and lock focus. AF or manual, doesn’t matter — get it and hold it.
Mount the filter — or both, if you’re stacking.
Go manual for anything past about one second; aperture priority is fine below that.
Take one test frame and read the histogram.
Shoot.
What Audiences Actually Feel: Nobody watching your film notices diffraction. They notice mush. They don’t see a 6-stop filter; they see water that looks like silk instead of shattered glass, and clouds that move like clouds. The technical argument is invisible to them. The result isn’t. That’s the whole reason to carry glass instead of arguing about shutter speeds.
How Do ISO and Sensor Size Change the ND You Need?
ISO changes how many stops you need. Sensor size changes depth of field and where diffraction bites. Only one of those changes your shopping list. If your travel camera is a phone because that’s what you’ll actually carry, the iPhone filmmaking workflow changes the arithmetic entirely — fixed aperture and a clip-on or magnetic ND, not a threaded filter.
ISO is the part that moves the filter count, and it’s the arithmetic from the stop math section above. Six stops at ISO 100, nine at ISO 800, same shot, same lens. That’s the difference between a stills kit and a daylight video kit.
Sensor size doesn’t change exposure, but it changes depth of field and diffraction. At the same framing and f-number, a smaller sensor gives you more depth of field than full-frame, not less. And diffraction shows up earlier in the frame — around f/8 on a 26MP APS-C sensor, and a stop or so later on a full-frame sensor of similar resolution. Super35 is its own case: the Komodo is under 26MP, so it sits between the two rather than matching either — treat it as closer to APS-C, but test your own body before you assume. That’s precisely why the Iceland workaround failed: stopping down to control light walked me into the mushy zone sooner than I expected.
What Are the Mistakes That Aren't Workflow?
Most ND failures are workflow failures — focus, stacking, safe zones. The three below aren't. They're physics, and they need a different fix.
| Problem | What's Actually Happening | Fix |
|---|---|---|
| Frame looks soft | Diffraction from stopping down to control light | Use more ND, open the aperture back up |
| Color cast at high density | IR contamination — strong NDs don't block infrared evenly | Test before you buy; an IR-cut ND or hot mirror is the fix |
| Exposure off every time | Trusting the rated stop count as exact | One test frame, check the histogram, adjust |
The IR note is worth taking seriously on cinema sensors, where the cast often shows up as magenta or brown at the densest end. Not every sensor shows it the same way, so test your own body before you build a trip around a filter.
Key Takeaways
- Buy the 6-stop first. Alone it covers stills in hard sun and video in shade or overcast.
- Add the 3-stop for fast-glass stills at the shutter ceiling, golden hour at low ISO, and bright window-lit interiors — and to stack onto the 6-stop for nine stops.
- Stack both for wide-open 180-degree video at high noon. Keep to 35mm full-frame equivalent and longer, because stacking vignettes wide glass.
- Buy your largest lens thread and use step-up rings. This one decision saves more money than any other.
- Skip variable NDs for stills, and don't expect five stops to do a nine-stop job.
- Lock focus before mounting, and mark the safe zone on any variable ND with nail polish.
Frequently Asked Questions
What ND filter should I buy first for travel?
A 6-stop (ND64). It covers the widest range of real travel situations — dark enough that you should focus before mounting it, but not so dark you can’t work. If you shoot daylight video on a log-profile body, plan on adding the 3-stop as well; six stops alone won’t hold a wide aperture at noon.
Is a 6-stop ND filter enough for waterfalls?
It gets you to roughly 1/4 to 1 second in bright sun, which is water with motion. For the classic silky look — 1–4 seconds — you need overcast, open shade, or a 10-stop.
Can I stack two ND filters?
Yes, and for daylight video you probably should. A 6-stop plus a 3-stop is nine stops, which is the number you need for f/2.8 at 1/50s in full sun on an ISO 800 body. Keep to 35mm full-frame equivalent and longer when stacked, and expect to lose your lens hood. Don’t stack an ND with a polarizer on wide glass — that’s where corners go dark.
Do I need a variable ND for travel video?
Only if you shoot solo run-and-gun in shifting moderate light and stay inside the safe zone. It tops out at five stops, so it can’t replace the two-filter kit for hard sun.
Wrap-up
Two filters. 3-stop and 6-stop.
That’s the travel kit. Covers 95% of situations. Lightweight. Affordable. Actually usable.
Add a 10-stop if you’re serious about long exposures or landscape work.
Skip the variable unless you’re primarily shooting video. And if you do video, get a quality variable—cheap ones look terrible.
The shot you miss because you didn’t pack an ND filter? That stings way more than carrying an extra 100 grams in your bag.
Trust me on that one.
Filters I Actually Use
Budget-Friendly Winner: K&F Concept Nano-X ND64 (6-Stop) – $50-70
This is my everyday travel filter. Good glass. Minimal color shift. Thin enough to not vignette on my 16-35mm. I’ve used this on three continents. Does it match a $300 filter? No. Does it work great for 90% of situations? Absolutely.
For Video: K&F Concept Variable ND2-ND32 (1-5 Stops) – $110
If you shoot video, this is solid. Smooth rotation. Decent color accuracy up to ND32. I use this for travel vlogs and B-roll. Not perfect at the extremes, but way better than cheap variables I’ve tried.
Heavy Hitter: Breakthrough Photography X4 ND1000 (10-Stop) – $110-150
This is the one I break out for serious long exposures. Neutral color. Sharp. Worth the premium if you actually use it. I don’t carry this on every trip, but when I do landscape work, it’s in the bag.
Step-Up Rings for Multi-Lens Use – $15-25
Buy your filters for your largest lens diameter, then use step-up rings for smaller lenses. Way cheaper than buying multiple filter sizes.
Budget Option for Testing: Tiffen ND 0.9 (3-Stop) – $35-50
If you’re new to ND filters and want to test before committing, this works. It’s not amazing, but it’s cheap and gets you started. Upgrade later.
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About the Author:
Trent Peek is a filmmaker specializing in directing, producing, and acting. He works with high-end cinema cameras from RED and ARRI and also values the versatility of cameras like the Blackmagic Pocket Cinema.
His recent short film “Going Home” was selected for the 2024 Soho International Film Festival, highlighting his skill in crafting compelling narratives. Learn more about his work on [IMDB], [YouTube], [Vimeo], and [Stage 32].
In his downtime, he likes to travel (sometimes he even manages to pack the right shoes), curl up with a book (and usually fall asleep after two pages), and brainstorm film ideas (most of which will never see the light of day). It’s a good way to keep himself occupied, even if he’s a bit of a mess at it all.
P.S. It’s really weird to talk in the third person
Tune In: He recently appeared on the Pushin Podcast, sharing insights into the director’s role in independent productions.
For more behind-the-scenes content and project updates, visit his YouTube channel at https://www.youtube.com/@trentalor.
For business inquiries, please get in touch with him at trentalor@peekatthis.com. You can also find Trent on Instagram @trentalor and Facebook @peekatthis.
What size ND filter should I buy?
The largest thread diameter you own or plan to own, then step-up rings for everything smaller. A ring set costs less than a single filter in the wrong size.
Conclusion
The best ND filter kit for travel is a 6-stop and a 3-stop, bought in your largest lens thread, with a cheap set of step-up rings doing the rest — separately for most of the trip, stacked for the hard-sun video shots.
The honest production reality is that filters fail you in ways that don’t look like gear failures. They look like a frame that’s slightly soft, a sky with a cross in it, a corner that’s darker than it should be. You don’t notice on set. You notice in the edit, when the option to go back is gone.
If you’re just starting: buy the 6-stop, buy the rings, and spend the money you saved on a better tripod. If you’ve already made this mistake: mark your variable ND, check your histogram on the first frame of every setup, and stop trusting the number printed on the ring. If you want the wider version of all this — the full carry-on kit, the workflow, the trip logistics — start with becoming a travel filmmaker. The gear was never the hard part. Packing the right two things is the hard part, and now you know which two.
Filters Used in the Field
All filters field-tested on documentary and travel work. No sponsored fluff.
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About the Author
Trent Peek is a filmmaker, writer, and producer based in Victoria, BC, and the founder of PeekAtThis.com. His production credits include set decoration on Netflix’s Maid, and writing/directing Going Home (2024 Soho International Film Festival) and Noelle’s Package (48-hour festival winner, shot on smartphone). He’s also a former President of Cinevic, Victoria’s Society of Independent Filmmakers, and works as a doorman at a four-star hotel — a job that’s taught him as much about reading people under pressure as any film set has.
When he’s not writing articles, testing gear, or working on film projects, Trent enjoys traveling, reading, exploring new technology, and developing future film ideas — many of which may never leave the notebook stage.
P.S. Writing in the third person still feels weird.
Trent recently appeared on the Pushin Podcast — listen to the full episode — where he discussed independent filmmaking, directing actors, production challenges, and lessons learned from working in film.