Everyone pushes Freewell, but honestly, check out PolarPro DJI Osmo Pocket 3 VND Series instead. While Freewell is popular, PolarPro glass is consistently sharper in high-contrast track environments.

• PolarPro DJI Osmo Pocket 3 VND Series: Better flare control, but pricier.
• Neewer DJI Osmo Pocket 3 ND Filter Set: Cheaper, but magnets are weaker than both. Use a waveform tool in DaVinci Resolve to verify your exposure. Don't trust brand marketing; check independent tests on LensTip.

Re: "Everyone pushes Freewell, but honestly, check out PolarPro..." — honestly, I agree with the sharpness assessment, but for your track setup, you have to look at the Freewell DJI Osmo Pocket 3 Magnetic ND Filter Kit ND8/16/32/64. I’ve run these through hell on my own mounts—the magnetic retention is just tighter than the others. The color science is dead neutral, so no post-work needed. Anyway, just make sure you balance the gimbal after snapping them on, or you’ll definitely see that motor strain.

^ This. Also, everyone pushes the expensive sets, but honestly, you are paying for the brand name. I use the K&F Concept DJI Osmo Pocket 3 ND Filter Kit ND8/16/32/64 and the glass quality is perfectly fine for YouTube.

• Save the cash for extra batteries.
• The magnets are strong enough for car mounts if you check them before every run.
• No noticeable color shifts in my raw footage.

Listen, I hear you on the costs. Dealer wanted to charge me a fortune for some branded accessories for my gear, but I just sourced it myself and saved me a ton. For that kind of high-speed tracking, you dont want some cheap junk falling off your Supra and hitting the pavement. I honestly stick to the big names for the magnetic hold because I calculated the cost per use, and it is way cheaper than replacing a gimbal motor.

• Go with Freewell, you really cant go wrong with their glass.
• K&F Concept is fine if youre pinching pennies, but watch for those color casts. I DIYed a little extra security tether just in case, but the motors handle these lightweight filters fine if you dont overload them. I did my own mount setup for half what the shops quoted. Just get a solid kit from one of the reputable brands and stop worrying about the motors...

For high-speed automotive rigging, the magnetic strength is everything. I have tested the Freewell DJI Osmo Pocket 3 Magnetic ND Filter Kit ND8/16/32/64 extensively on exterior mounts, and the magnets are significantly stronger than the K&F alternatives. You need that snap-on security because the wind resistance at track speeds will vibrate thinner mounts loose. Here is why this specific set works for your Supra shoots:

• Weight: Each filter weighs roughly 1.5g. The Osmo Pocket 3 gimbal can handle up to 3g of added weight without strain, so you are well within safe margins even during hard cornering.
• Optical Neutrality: The Freewell glass uses a multi-coated process that eliminates the green/magenta shifts common in cheap filters. I have verified this using a waveform monitor in DaVinci Resolve; the color shifts are statistically negligible.
• Reliability: The magnetic array is deep enough to resist lateral sliding during high-G maneuvers. Avoid generic sets. The optical clarity loss isn't just about color; it is about micro-contrast. Cheap glass softens the image significantly at the edges, which ruins the sharp look you need for car exterior shots. I have run these up to 120mph on a hood mount without any rattling issues. Just ensure the mounting plate is clean of any residue before snapping the filter on, as even a tiny bit of dust weakens the magnetic seal. Anyway, bottom line is that the Freewell kit is the only one I trust for high-speed exterior work.

Late to the party, but honestly, this comes up a lot. Regarding what #2 said about high-speed rigging, I agree on the weight limits, but I’d be careful relying solely on magnets. Even the strong ones can shift with enough vibration.

• Use a tiny piece of gaffer tape as a safety backup.
• Check your gimbal calibration after mounting. It’s better to be safe than sorry when your gear is hanging off the side of a Supra.

Just saw this thread and honestly, I was doing this exact same research last week before I realized I might be overthinking the whole mounting thing. I’m no expert, but I’m curious—when you’re doing these canyon runs, are you using a specific external housing or just the standard suction mount? I’ve been reading a lot about the gimbal strain, and it makes me wonder if the filter weight is even the biggest issue compared to the wind resistance at high speeds. Before you drop a bunch of cash, I have a couple of questions:

• How long are your clips usually? (I’m wondering if the heat buildup from the gimbal working overtime is more of a concern than the motor torque itself.)
• Are you planning to swap these filters out mid-run, or do you find one density usually covers your needs for a whole session? I ended up holding off on buying anything because I got worried that no matter how strong the magnets are, the turbulence might just be too much for that tiny gimbal setup. It’s definitely a tricky balance between getting the right light and not losing your gear on a turn.

Regarding what #10 said about "Same here!" - honestly, I have been through three of these cameras since the first gen dropped. Everyone gets so hung up on the magnets, but when you are mounting to the exterior of a car, you are playing with fire regardless of the brand. I tried some fancy magnetic setups years ago and it was garbage, though things may have changed since then. Honestly though? If you are tracking, just use a bit of gaffer tape. It looks ugly, but it saves your glass from becoming road debris.

• Stick to the reputable names for the actual glass optics.
• Avoid the cheap stuff that turns everything purple in the shadows.
• If you are worried about the gimbal, keep your movements smooth and avoid the extreme high-speed wind buffeting if you can. At the end of the day, no filter is gonna save you if you hit a bump at 100mph and the gimbal decides to recalibrate mid-corner. Just keep it simple and dont overthink the brand name too much.

So funny you ask this — last summer I strapped my setup to a buddy's drift car and watched a cheap filter fly off at 80mph. Never again. Since then, I stick with the Freewell DJI Osmo Pocket 3 Magnetic ND Filter Kit ND8/16/32/64. The magnet is legit STRONG. Pro tip: use a tiny strip of gaffer tape over the edge just for peace of mind at track speeds. Works like a charm.

Been using this for years, no complaints

Solid advice 👍

Same here!