K
Kenny Nyhus Fadil
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Buy the wrong ND set for a drone and you own a small stack of aluminium frames that either unbalance the gimbal or sit in the case until you sell them. The filters are the cheapest part of the kit and the easiest thing to get wrong, because the thing they modify is not a still photograph. It is a shutter angle.
DJI’s own formula for the 180-degree rule is exposure time equals shutter opening angle divided by frame rate times 360. At 24 frames per second with a 180-degree shutter, that is 1/48 s. DJI’s Air 3S filter page says the set exists so you can hold that angle with a low ISO in bright light. Fixed ND sets for the Mini, Air and Mavic families are built around exactly that job, and the choice here is one for a gimbal camera rather than for a lens you can stop down.
I fly a small drone and a larger one on the same shoots, and the filter case has become the piece of kit I think about hardest before a video day. Stop arithmetic belongs on the ND filter stops guide, which explains how many stops you actually need and why the numbers on the rim lie to you at dusk. Graduated filters are a separate decision, covered in graduated ND versus bracketing. On the drone, three things decide it: shutter angle, gimbal weight, and which set fits which camera. If the exposure side is still new, start with the drone photography guide.
A drone camera has one aperture and no lens bag. You cannot stop down to lose light, you cannot swap to a slower lens, and the shutter speed is the only exposure variable left once the ISO is at its base. In bright light that leaves you choosing between a correct exposure and the motion blur that makes aerial video look like video rather than like a sequence of sharp stills.
On the ground I can put a 6-stop filter on a 35mm lens and accept a slower shutter because the camera is on a tripod. In the air the camera is moving at speed over a landscape, and the relationship between shutter speed and motion blur is the whole look. Too fast a shutter and the footage strobes — the classic aerial look where every tree and roof edge jitters as the aircraft advances. Too slow and the whole frame smears. The filter is how you land in the narrow band between those two.
There is a second reason that has nothing to do with video. On a stills flight in harsh midday sun, an ND lets me hold a wider aperture for a shallower depth of field or use a slower shutter for a deliberate pan blur, without the ISO dropping below base. I use it less for stills than for video, but on a bright snow or water scene it earns its place.
Filmmakers describe shutter speed as an angle because the shutter in a cinema camera is a rotating disc. A 180-degree shutter is open for half of each frame’s duration, which is why 24 fps gives 1/48 s. DJI states the relationship directly: exposure time equals the shutter opening angle divided by frame rate times 360, and gives the 24 fps example as 1/48 s.
What that means in the air is simple enough. At 24 fps you want roughly 1/50 s, at 30 fps roughly 1/60 s, at 60 fps roughly 1/120 s. The light hitting the sensor decides how much ND you need to get there. DJI’s own description of the Air 3S set is that it lets you shoot smooth footage in bright environments with lower shutter speeds, even when the shutter opens to 180 degrees with a low ISO.
Where pilots go wrong is treating the rule as a law instead of a default. A slow, gliding reveal at 24 fps wants the 180-degree blur. A fast tracking shot at 60 fps over a forest sometimes looks better with a slightly faster shutter, because the extra sharpness helps the viewer track the subject. The rule gives you a starting point; the shot decides the rest. I break it deliberately when I am flying close to a subject and want texture rather than cream.
Most drone filter sets are fixed ND, and the alternative is an ND/PL hybrid that combines neutral density with a polariser. The polariser cuts glare from water, glass and wet roofs — genuinely useful from the air, where you are often shooting across a surface at an angle that reflects the sky. The catch is that a polariser’s effect depends on its rotation relative to the sun, and on a gimbal camera you cannot rotate the filter mid-flight.
That is the trade. A fixed ND is predictable: same density, same result, no orientation to think about. An ND/PL gives you a deeper sky and cleaner water in one orientation, and a weaker or uneven effect in another. I keep both because the hybrid is the only way to get a polarised aerial frame without a second camera, and I accept that some of the flight will be at the wrong angle.
The hybrid sets also concentrate their density at the top end. Freewell’s Bright Day six-pack for the Mini 4 Pro runs ND16/PL through ND1000/PL, which is four to ten stops. Ten stops is a lot of light loss for a moving camera; it is there for the middle of a bright day over water, not for a golden-hour flight. If you shoot mostly early and late, the top of that range will stay in the case.
DJI’s advice is to use official DJI ND filters because they are designed to work with the gimbal camera’s centre of gravity. That sentence is the whole argument for first-party glass on a small drone. The gimbal motors are calibrated around a known mass, and a filter that is heavier on one side than the other shows up as a slight tilt or a motor that runs warm.
The numbers show how much the mass scales with the camera. The DJI Mini 4 Pro set weighs 0.75 g per filter. The Air 3S set is 2.84 g per filter. The Mavic 4 Pro set is approximately 5.1 g per filter. Among DJI’s own three sets, the Mini 4 Pro filters are the lightest per filter — a fair comparison only within that family, because third-party weights are not published consistently and Freewell does not list a weight for its Bright Day set at all.
In practice, a third-party filter on a Mini is usually fine because the whole camera is light and the gimbal has margin. On a Mavic the margin is tighter and the lens barrel is bigger, so the penalty for a badly machined frame is more visible. If you fit a filter and the horizon sits a degree off, or the gimbal twitches at the end of a tilt, take it off and check the seat before you blame the aircraft.
DJI sells a small first-party set for each airframe and the third parties fill in the gaps with larger packs. Which one you want depends on whether you need three densities or a full ladder, and whether you shoot video or stills.
The price column uses each maker’s own US store (DJI Store, Freewell, PolarPro), and bundles and sales shift it often.
The Mini 4 Pro set is the value play. Three densities cover bright, brighter and snow, and the frames are light enough that the gimbal does not notice them. The DJI Mini 4 Pro ND Filter Set (ND16/64/256) is what I would put on that aircraft first, and it is the set I recommend to anyone who flies a Mini and shoots video only occasionally.
If you want the polariser and the full ladder in one case, the Freewell Bright Day 6-Pack (DJI Mini 4 Pro) covers four to ten stops with the hybrid ND/PL design. Freewell describes the coating as dustproof, scratch-resistant, oilproof and colour-neutral, and calls the frame GimbalSafe. Those are maker claims, and the extra densities are only worth carrying if you actually shoot at midday.
For the Air 3S the first-party set is the safer buy: ND8, ND32 and ND128, 2.84 g per filter, and DJI’s own light-transmission sizing for the wide and medium-tele cameras. DJI sells it as the DJI Air 3S ND Filters Set through its own store. The third-party alternative is the Freewell Air 3S Split ND Filter 4-Pack, and Freewell’s own Air 3S range extends to an eight-pack with both ND and ND/PL densities.
Mavic 4 Pro owners have one first-party option, the DJI Mavic 4 Pro ND Filters Set, which is the heaviest of the three at approximately 5.1 g per filter and is listed as discontinued on DJI’s US store. That matters: if you are buying a Mavic 4 Pro today, check the set’s availability before you plan a video workflow around it, and look at the third-party options if it is gone.
PolarPro’s Air 3S line is split into a Vivid Collection of ND/PL filters and a Shutter Collection of ND with mist diffusion. The PolarPro DJI Air 3S filters are the premium end of the category, and the Shutter Collection is the one to look at if you want the highlight bloom that a mist filter adds to aerial footage. PolarPro does not publish a per-filter weight for this set, so weigh it against the DJI set yourself before a long flight.
An ND filter is a tool for adding light loss, not for fixing exposure. Put a 10-stop hybrid on a drone at dusk and the camera will either raise ISO or drop the shutter to a speed where the footage stutters. Neither is a look you want. The filter has to match the light, which is why a three-density set is often more useful than a six-density one.
The upper limit is practical. At 24 fps, a 10-stop filter in full sun will put you well below the 1/48 s target unless you also raise ISO, which defeats the point. In shade or at golden hour, the same filter is unusable. That is why the Bright Day set’s ND1000/PL is a specialist tool and the ND16/PL is the workhorse.
The lower limit is the one that catches people. A 4-stop filter on an overcast day can push the shutter below 1/30 s at 24 fps, and the resulting blur is not cinematic, it is soft. When the light drops I take the filter off rather than fight it. The aircraft does not care, and the footage is better for the honesty. The aerial exposure field guide covers the shutter and ISO decisions around the filter.
Three questions decide it. Does the aircraft have a first-party set that covers my usual light? Do I need a polariser for the location? And am I flying video or stills?
For a bright coastal video day I take the hybrid set, because the polariser is doing real work on the water and the top densities cover the middle of the day. For a winter stills flight over snow I take the first-party ND16 and ND64, because snow is a giant reflector and two densities are enough. For a blue-hour flight I take no filter at all and rely on the base ISO.
The mistake I made early was buying a big set and assuming I would grow into it. I used two filters out of six for a year. Buy the set that covers the light you actually shoot in, and add the extremes when a specific job demands them. The variable versus fixed ND comparison is worth reading before you consider a variable filter on a drone, because the mechanical stack inside a variable does not always play nicely with a small gimbal.
Change filters on the ground, with the aircraft powered down, and keep a microfiber cloth in the case. A fingerprint on a drone filter is magnified by the small sensor and the wide lens, and it is the kind of defect you only see when the footage is on a big screen. I wipe every filter before it goes on, even a fresh one out of the foam.
The other habit is labelling. The densities look identical in a dim bag, and fitting the 10-stop when you meant the 4-stop is a wasted flight. A dab of paint on the rim, or keeping them in the order they came in the case, is enough. Small thing. It has saved me more flights than any setting.
If you shoot video in bright light, yes. A drone has a fixed aperture, so the shutter is your only exposure control. The 180-degree rule wants roughly 1/50 s at 24 fps, and in full sun you cannot get there without cutting light.
DJI’s own formula gives 1/48 s at 24 fps with a 180-degree shutter. In practice most pilots run 1/50 s. At 30 fps the target is 1/60 s and at 60 fps it is 1/120 s.
They do a different job. The polariser cuts glare from water, glass and wet roofs, which is useful from the air. But the effect depends on the filter angle to the sun, and you cannot rotate it on a gimbal mid-flight, so some frames will not get the full benefit.
It can. DJI designs its own filters around the gimbal camera’s centre of gravity, and the first-party sets weigh 0.75 g per filter on the Mini 4 Pro, 2.84 g on the Air 3S and about 5.1 g on the Mavic 4 Pro. If the horizon sits off or the gimbal twitches, reseat the filter first.
The DJI three-filter set of ND16, ND64 and ND256 covers most bright-light work and weighs very little. Add a hybrid set only if you want a polariser or shoot at midday, where the extra densities earn their place.
Some pilots do, but the mechanical stack inside a variable filter adds mass and can vignette on a wide drone lens. Fixed densities are more predictable on a gimbal, and the sets are built around the aircraft’s own camera.
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DJI’s own formula for the 180-degree rule is exposure time equals shutter opening angle divided by frame rate times 360. At 24 frames per second with a 180-degree shutter, that is 1/48 s. DJI’s Air 3S filter page says the set exists so you can hold that angle with a low ISO in bright light. Fixed ND sets for the Mini, Air and Mavic families are built around exactly that job, and the choice here is one for a gimbal camera rather than for a lens you can stop down.
I fly a small drone and a larger one on the same shoots, and the filter case has become the piece of kit I think about hardest before a video day. Stop arithmetic belongs on the ND filter stops guide, which explains how many stops you actually need and why the numbers on the rim lie to you at dusk. Graduated filters are a separate decision, covered in graduated ND versus bracketing. On the drone, three things decide it: shutter angle, gimbal weight, and which set fits which camera. If the exposure side is still new, start with the drone photography guide.
Why a Drone Needs ND More Than a Ground Camera
A drone camera has one aperture and no lens bag. You cannot stop down to lose light, you cannot swap to a slower lens, and the shutter speed is the only exposure variable left once the ISO is at its base. In bright light that leaves you choosing between a correct exposure and the motion blur that makes aerial video look like video rather than like a sequence of sharp stills.
On the ground I can put a 6-stop filter on a 35mm lens and accept a slower shutter because the camera is on a tripod. In the air the camera is moving at speed over a landscape, and the relationship between shutter speed and motion blur is the whole look. Too fast a shutter and the footage strobes — the classic aerial look where every tree and roof edge jitters as the aircraft advances. Too slow and the whole frame smears. The filter is how you land in the narrow band between those two.
There is a second reason that has nothing to do with video. On a stills flight in harsh midday sun, an ND lets me hold a wider aperture for a shallower depth of field or use a slower shutter for a deliberate pan blur, without the ISO dropping below base. I use it less for stills than for video, but on a bright snow or water scene it earns its place.
The 180-Degree Shutter Rule in Drone Terms
Filmmakers describe shutter speed as an angle because the shutter in a cinema camera is a rotating disc. A 180-degree shutter is open for half of each frame’s duration, which is why 24 fps gives 1/48 s. DJI states the relationship directly: exposure time equals the shutter opening angle divided by frame rate times 360, and gives the 24 fps example as 1/48 s.
What that means in the air is simple enough. At 24 fps you want roughly 1/50 s, at 30 fps roughly 1/60 s, at 60 fps roughly 1/120 s. The light hitting the sensor decides how much ND you need to get there. DJI’s own description of the Air 3S set is that it lets you shoot smooth footage in bright environments with lower shutter speeds, even when the shutter opens to 180 degrees with a low ISO.
Where pilots go wrong is treating the rule as a law instead of a default. A slow, gliding reveal at 24 fps wants the 180-degree blur. A fast tracking shot at 60 fps over a forest sometimes looks better with a slightly faster shutter, because the extra sharpness helps the viewer track the subject. The rule gives you a starting point; the shot decides the rest. I break it deliberately when I am flying close to a subject and want texture rather than cream.
Fixed ND, ND/PL and the Gimbal Problem
Most drone filter sets are fixed ND, and the alternative is an ND/PL hybrid that combines neutral density with a polariser. The polariser cuts glare from water, glass and wet roofs — genuinely useful from the air, where you are often shooting across a surface at an angle that reflects the sky. The catch is that a polariser’s effect depends on its rotation relative to the sun, and on a gimbal camera you cannot rotate the filter mid-flight.
That is the trade. A fixed ND is predictable: same density, same result, no orientation to think about. An ND/PL gives you a deeper sky and cleaner water in one orientation, and a weaker or uneven effect in another. I keep both because the hybrid is the only way to get a polarised aerial frame without a second camera, and I accept that some of the flight will be at the wrong angle.
The hybrid sets also concentrate their density at the top end. Freewell’s Bright Day six-pack for the Mini 4 Pro runs ND16/PL through ND1000/PL, which is four to ten stops. Ten stops is a lot of light loss for a moving camera; it is there for the middle of a bright day over water, not for a golden-hour flight. If you shoot mostly early and late, the top of that range will stay in the case.
Weight and Gimbal Balance
DJI’s advice is to use official DJI ND filters because they are designed to work with the gimbal camera’s centre of gravity. That sentence is the whole argument for first-party glass on a small drone. The gimbal motors are calibrated around a known mass, and a filter that is heavier on one side than the other shows up as a slight tilt or a motor that runs warm.
The numbers show how much the mass scales with the camera. The DJI Mini 4 Pro set weighs 0.75 g per filter. The Air 3S set is 2.84 g per filter. The Mavic 4 Pro set is approximately 5.1 g per filter. Among DJI’s own three sets, the Mini 4 Pro filters are the lightest per filter — a fair comparison only within that family, because third-party weights are not published consistently and Freewell does not list a weight for its Bright Day set at all.
In practice, a third-party filter on a Mini is usually fine because the whole camera is light and the gimbal has margin. On a Mavic the margin is tighter and the lens barrel is bigger, so the penalty for a badly machined frame is more visible. If you fit a filter and the horizon sits a degree off, or the gimbal twitches at the end of a tilt, take it off and check the seat before you blame the aircraft.
The Sets, Model by Model
DJI sells a small first-party set for each airframe and the third parties fill in the gaps with larger packs. Which one you want depends on whether you need three densities or a full ladder, and whether you shoot video or stills.
| Set | Fits | Contents | Weight per filter | US price |
| DJI Mini 4 Pro ND Filter Set | Mini 4 Pro | ND16, ND64, ND256 | 0.75 g | $55 |
| Freewell Bright Day 6-Pack | Mini 4 Pro | ND16/PL to ND1000/PL, 4 to 10 stops | Not published | $69.99 |
| DJI Air 3S ND Filter Set | Air 3S | ND8, ND32, ND128 | 2.84 g | $99 |
| DJI Mavic 4 Pro ND Filters Set | Mavic 4 Pro | ND8, ND16, ND32, ND64 | approx. 5.1 g | $179 |
| PolarPro Vivid Collection | Air 3S | ND/PL set | Not published | $99.99 |
The price column uses each maker’s own US store (DJI Store, Freewell, PolarPro), and bundles and sales shift it often.
The Mini 4 Pro set is the value play. Three densities cover bright, brighter and snow, and the frames are light enough that the gimbal does not notice them. The DJI Mini 4 Pro ND Filter Set (ND16/64/256) is what I would put on that aircraft first, and it is the set I recommend to anyone who flies a Mini and shoots video only occasionally.
If you want the polariser and the full ladder in one case, the Freewell Bright Day 6-Pack (DJI Mini 4 Pro) covers four to ten stops with the hybrid ND/PL design. Freewell describes the coating as dustproof, scratch-resistant, oilproof and colour-neutral, and calls the frame GimbalSafe. Those are maker claims, and the extra densities are only worth carrying if you actually shoot at midday.
For the Air 3S the first-party set is the safer buy: ND8, ND32 and ND128, 2.84 g per filter, and DJI’s own light-transmission sizing for the wide and medium-tele cameras. DJI sells it as the DJI Air 3S ND Filters Set through its own store. The third-party alternative is the Freewell Air 3S Split ND Filter 4-Pack, and Freewell’s own Air 3S range extends to an eight-pack with both ND and ND/PL densities.
Mavic 4 Pro owners have one first-party option, the DJI Mavic 4 Pro ND Filters Set, which is the heaviest of the three at approximately 5.1 g per filter and is listed as discontinued on DJI’s US store. That matters: if you are buying a Mavic 4 Pro today, check the set’s availability before you plan a video workflow around it, and look at the third-party options if it is gone.
PolarPro’s Air 3S line is split into a Vivid Collection of ND/PL filters and a Shutter Collection of ND with mist diffusion. The PolarPro DJI Air 3S filters are the premium end of the category, and the Shutter Collection is the one to look at if you want the highlight bloom that a mist filter adds to aerial footage. PolarPro does not publish a per-filter weight for this set, so weigh it against the DJI set yourself before a long flight.
Shutter-Speed Limits and When an ND Hurts
An ND filter is a tool for adding light loss, not for fixing exposure. Put a 10-stop hybrid on a drone at dusk and the camera will either raise ISO or drop the shutter to a speed where the footage stutters. Neither is a look you want. The filter has to match the light, which is why a three-density set is often more useful than a six-density one.
The upper limit is practical. At 24 fps, a 10-stop filter in full sun will put you well below the 1/48 s target unless you also raise ISO, which defeats the point. In shade or at golden hour, the same filter is unusable. That is why the Bright Day set’s ND1000/PL is a specialist tool and the ND16/PL is the workhorse.
The lower limit is the one that catches people. A 4-stop filter on an overcast day can push the shutter below 1/30 s at 24 fps, and the resulting blur is not cinematic, it is soft. When the light drops I take the filter off rather than fight it. The aircraft does not care, and the footage is better for the honesty. The aerial exposure field guide covers the shutter and ISO decisions around the filter.
How I Choose a Set for a Shoot
Three questions decide it. Does the aircraft have a first-party set that covers my usual light? Do I need a polariser for the location? And am I flying video or stills?
For a bright coastal video day I take the hybrid set, because the polariser is doing real work on the water and the top densities cover the middle of the day. For a winter stills flight over snow I take the first-party ND16 and ND64, because snow is a giant reflector and two densities are enough. For a blue-hour flight I take no filter at all and rely on the base ISO.
The mistake I made early was buying a big set and assuming I would grow into it. I used two filters out of six for a year. Buy the set that covers the light you actually shoot in, and add the extremes when a specific job demands them. The variable versus fixed ND comparison is worth reading before you consider a variable filter on a drone, because the mechanical stack inside a variable does not always play nicely with a small gimbal.
The Filter Case Habit That Saves a Flight
Change filters on the ground, with the aircraft powered down, and keep a microfiber cloth in the case. A fingerprint on a drone filter is magnified by the small sensor and the wide lens, and it is the kind of defect you only see when the footage is on a big screen. I wipe every filter before it goes on, even a fresh one out of the foam.
The other habit is labelling. The densities look identical in a dim bag, and fitting the 10-stop when you meant the 4-stop is a wasted flight. A dab of paint on the rim, or keeping them in the order they came in the case, is enough. Small thing. It has saved me more flights than any setting.
Do I really need ND filters for drone video?
If you shoot video in bright light, yes. A drone has a fixed aperture, so the shutter is your only exposure control. The 180-degree rule wants roughly 1/50 s at 24 fps, and in full sun you cannot get there without cutting light.
What shutter speed should a drone use at 24 fps?
DJI’s own formula gives 1/48 s at 24 fps with a 180-degree shutter. In practice most pilots run 1/50 s. At 30 fps the target is 1/60 s and at 60 fps it is 1/120 s.
Are ND/PL filters better than plain ND for drones?
They do a different job. The polariser cuts glare from water, glass and wet roofs, which is useful from the air. But the effect depends on the filter angle to the sun, and you cannot rotate it on a gimbal mid-flight, so some frames will not get the full benefit.
Will a third-party filter unbalance the gimbal?
It can. DJI designs its own filters around the gimbal camera’s centre of gravity, and the first-party sets weigh 0.75 g per filter on the Mini 4 Pro, 2.84 g on the Air 3S and about 5.1 g on the Mavic 4 Pro. If the horizon sits off or the gimbal twitches, reseat the filter first.
Which ND set should I buy for a Mini 4 Pro?
The DJI three-filter set of ND16, ND64 and ND256 covers most bright-light work and weighs very little. Add a hybrid set only if you want a polariser or shoot at midday, where the extra densities earn their place.
Can I use a variable ND filter on a drone?
Some pilots do, but the mechanical stack inside a variable filter adds mass and can vignette on a wide drone lens. Fixed densities are more predictable on a gimbal, and the sets are built around the aircraft’s own camera.
Keep Building
- The Drone Photography Guide: Aerial Imaging From a Glass-First Shooter
- ND Filter Guide: How Many Stops You Actually Need
- Variable ND vs. Fixed ND Filters: Which Should You Buy?
- Graduated ND Filters vs. Bracketing for Bright Skies
- Drone Photography Settings: The Field Guide to Aerial Exposure
- Golden Hour Drone Photography Tips
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