Best ND Filters for Long Exposure Photography
What an ND Filter Does and Why You Need One
A neutral density filter is a darkened piece of glass that sits in front of your lens and reduces the amount of light entering the camera. That lets you use slower shutter speeds in bright conditions without blowing out the exposure. The result: silky waterfalls, streaked clouds, blurred crowds, and glassy ocean surfaces that are impossible to capture without one.
Think of it like sunglasses for your lens. A 6-stop ND cuts the light by 64x, while a 10-stop cuts it by 1024x. The stronger the filter, the longer your exposure can run in daylight.
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Understanding ND Filter Strengths
ND filters are measured in "stops" of light reduction. Here is a quick reference:
| Stops | ND Number | Light Reduction | Typical Use |
|---|---|---|---|
| 3 | ND8 | 8x | Portraits in bright sun, video work |
| 6 | ND64 | 64x | Waterfalls, rivers, sunset long exposures |
| 10 | ND1000 | 1024x | Midday long exposures, cloud streaks |
| 15 | ND32768 | 32768x | Extreme daytime multi-minute exposures |
For most landscape photographers, a 6-stop ND is the single most versatile filter. At golden hour, shooting at ISO 100 and f/11, a 6-stop ND pushes your exposure into the 2 to 4 minute range. That is enough to turn choppy water into glass and give clouds a beautiful directional streak.
A 10-stop ND is the go-to for midday work. When the sun is high and harsh, a 10-stop lets you push exposures past 30 seconds even at noon, turning busy street scenes into ghostly emptiness or creating surreal minimalist seascapes.
Fixed vs. Variable ND Filters
There are two main types of ND filters: fixed and variable.
Fixed ND filters provide a single, consistent level of light reduction. A 6-stop is always a 6-stop. They tend to have better optical quality, more neutral color rendering, and no cross-pattern artifacts. The downside is you need multiple filters for different situations.
Variable ND filters use two polarizing elements that rotate against each other to adjust the density, typically across a range like 2 to 5 stops or 5 to 9 stops. They are convenient because one filter covers a range of densities. The trade-off is that cheaper variable NDs can produce uneven darkening (the "X" pattern) at higher densities, and they may introduce more color cast than a quality fixed filter.
For dedicated long exposure landscape work, fixed NDs give better results. For video shooters or photographers who want flexibility without carrying multiple filters, a variable ND is more practical.
Best ND Filters by Budget
Best Budget: K&F Concept ND1000 (10-Stop)
The K&F Concept ND1000 is hard to beat for the price. At around $25 to $40 depending on the thread size, you get multi-coated glass with minimal color cast. Multiple reviewers have noted that the optical quality punches well above its price point, with some assuming the filters were worth three times their retail price. The build quality is solid for a budget filter, and the results are close to neutral.
If you are just getting into long exposure photography and want to experiment without a big investment, this is the filter to start with. You can always upgrade later, but many photographers find they never need to.
Best Value System: NiSi JetMag Pro Landscape ND Kit
The NiSi JetMag Pro Landscape Kit is a complete magnetic filter system that includes 3-stop, 6-stop, and 10-stop ND filters plus a circular polarizer. Priced around $400 to $500, it is a significant investment, but you get a full set of filters with a magnetic mounting system that makes swapping filters fast and secure.
NiSi's patented locking mechanism keeps filters from accidentally falling off, even when stacking multiples. The magnetic click-on design is especially welcome in cold weather when you are wearing gloves. The optical quality is excellent with minimal color shift, and having three ND strengths plus a CPL covers virtually every landscape scenario.
Best Premium: Breakthrough Photography X4 ND
Breakthrough Photography makes some of the most color-neutral ND filters available. Their X4 line uses Schott glass from Germany with multi-layer nanotec coatings, and reviewers consistently report essentially zero color cast. A single 6-stop X4 ND runs around $130 to $170 depending on diameter.
The build quality is exceptional, with brass construction and a knurled edge that makes removal easy. If you want the absolute best optical performance and do not mind paying for it, Breakthrough is the brand to beat.
Best Square Filter System: Lee Filters ProGlass IRND
The Lee Filters ProGlass IRND range is a benchmark for square filter systems. Available in six densities from 2 stops up to 15 stops, these filters block infrared and ultraviolet light for improved contrast and color accuracy. The 10-stop "Big Stopper" and 6-stop "Little Stopper" are iconic filters in the landscape photography world.
Square filter systems require a separate holder and adapter rings, but the advantage is that one set of filters works across all your lenses regardless of thread size. Lee filters are priced in the $100 to $200 range per filter, with the holder system adding another $50 to $100.
How to Choose the Right Thread Size
If you are buying circular (screw-on) ND filters, buy the filter to fit your largest lens, then use step-up rings for your smaller lenses. Step-up rings cost just a few dollars and let one filter work across your entire kit.
For example, if your widest lens has a 77mm thread and your other lenses are 67mm and 52mm, buy 77mm filters and get 67-to-77mm and 52-to-77mm step-up rings. Just watch for vignetting on ultra-wide lenses when stacking rings and filters.
Tips for Better Long Exposures
Use a sturdy tripod. This sounds obvious, but a flimsy tripod will ruin even the best long exposure. Wind, vibration from passing traffic, or even the mirror slap on a DSLR can introduce blur during multi-second exposures.
Compose and focus before attaching the filter. A 10-stop ND makes your viewfinder essentially black. Set up your composition, lock focus to manual, then attach the filter.
Use a remote shutter or timer. Pressing the shutter button introduces camera shake. Use a 2-second timer, a cable release, or your camera's app-based remote.
Cover the viewfinder. On DSLRs, light can leak through the optical viewfinder during long exposures, causing light streaks in your image. Use the eyepiece cover or drape a cloth over it. Mirrorless cameras do not have this problem.
Check your EXIF data. After your shoot, use ExifGrabber to review the exposure settings on your long exposure shots. Comparing shutter speeds, apertures, and ISO values across a series helps you dial in your technique for next time.
Bracket your exposures. Start with the calculated exposure time, then shoot one stop over and one stop under. ND filter exposure calculations are estimates, and conditions change. Having brackets gives you options in post.
Calculating Exposure Time with an ND Filter
The math is straightforward. Without the filter, meter your scene normally and note the shutter speed. Then multiply by 2 raised to the power of the filter's stop value.
For a 6-stop ND: multiply the base shutter speed by 64. If your unfiltered exposure is 1/30s, your filtered exposure is about 2 seconds. For a 10-stop ND: multiply by 1024. That same 1/30s becomes about 34 seconds.
Most photographers use a phone app for this. Apps like PhotoPills or Lee Filters' Stopper app handle the math and include a built-in timer.
Wrapping Up
For most photographers, a 6-stop fixed ND is the best starting point. The K&F Concept ND1000 gets you shooting long exposures for under $40, while the NiSi JetMag Pro kit sets you up with a complete magnetic system. If ultimate optical quality matters most, Breakthrough Photography's X4 line is hard to beat.
Whatever filter you choose, the key is getting out and experimenting. Long exposure photography transforms ordinary scenes into something extraordinary, and an ND filter is the one piece of gear that makes it possible in daylight.