Slow Motion Video Guide: Frame Rates, Light & Cameras

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Mastering Slow-Motion: A Beginner’s Guide to Capturing Stunning Slow-Mo Video

At 5:47 AM the fog was sitting in the cedars exactly the way I’d pictured it for the pivotal scene in Going Home: the actress walking toward camera at 120fps, the first light just starting to come through the trees. We had a RED Komodo with Atlas Orion anamorphics on it. Every frame came back dim and noisy, like security-camera footage.

The camera wasn’t the problem. I hadn’t understood how much light slow motion eats, and we burned four hours waiting for the sun to climb high enough to fix the exposure. By then the fog was gone.

The $800 broke down as lost crew time, extended location fees, and the fog hours we burned waiting for the sun. The scene still works in the final cut. I know what we lost.

Affiliate Disclosure: If you use these links, PeekAtThis gets a small commission at no extra cost to you. We only list gear that actually survives a production day. I’ve operated some of it on set, and where I haven’t, I say so.

Shoot slow motion at 60fps minimum, 120fps for hero shots, and 240fps only for single effect moments. Set your shutter to double your frame rate. Light the scene hard, because 120fps with a 1/240 shutter cuts your light by roughly 80% versus 24fps. Stabilize the camera, because high frame rates magnify every wobble.

That opening walk — first light pushing through the cedars and the fog still hanging low around her.

Why Does Lighting Matter More Than Your Camera Body?

Slow motion is a lighting problem before it is a camera problem. A 1/240 shutter at 120fps lets in about 80% less light than the 1/50 shutter you use at 24fps, so a room that looked fine at 24fps goes dark. A $1,200 mirrorless body with a $300 LED panel will beat a $4,000 body in available light.

The Slow-Mo Viability Triangle

Before you hit record at high frame rates, make sure you have all three:

  1. Light Available: Enough light to support shutter speeds of 1/120s to 1/480s without pushing ISO into noise.

  2. Motion Worth Slowing: Micro-expressions, fluid mechanics, physics, or high-speed action. Static subjects don’t get better in slow motion. They get boring.

  3. Stability Achievable: Tripod, fluid head, gimbal, or a heavy rig. Micro-jitter is much easier to see once it’s slowed down.

If any one of these is missing, shoot 24fps and save yourself the storage.

How much light does 120fps actually eat?

At 24fps with a 1/50 shutter, each frame is exposed for 1/50 of a second. At 120fps with a 1/240 shutter, each frame gets 1/240. That is about 2.3 stops less light, or roughly 80% gone.

At 240fps with a 1/480 shutter, you lose about 3.3 stops, roughly 90%. Every stop you can’t add with light, you pay for in ISO. Losing 2.3 stops means about five times the ISO for the same exposure.

Common Beginner Mistake: Dialing in exposure at 24fps, then switching to 120fps without re-exposing. The switch costs about 2.3 stops, and the screen won’t always warn you. Set the frame rate and shutter first, then expose.

What should you do differently after a lost morning?

The Going Home fog taught me four rules I now treat as non-negotiable:

  • Scout and test at the exact time of day, in the actual location light, not in any other room.

  • Carry one 300W-class LED panel as insurance, even when the forecast says sunny.

  • Test your camera’s noise floor at the ISO values you’ll need before the shoot, not during it.

  • Shoot a 10-second 120fps test on location before the actress is in hair and makeup.

That $800 is the seed for this whole guide. The camera body was the least important variable on that set.

What does a professional slow-motion lighting setup look like, and what is the budget version?

From my spot as set dresser on Maid, I watched the DP light a slow-motion shot of a character dropping a glass. They used a key light (an Aputure 300D) through diffusion, a fill (two smaller LEDs bounced off a white card), and a backlight (a small Litemat) to separate the subject from the background.

Total wattage was probably 500W+ for a 3-second shot. It was a Netflix show, so the budget was there.

The budget version I’ve used on indie sets:

  • One 60W-class LED as key (I used a Godox SL60W)

  • A white poster board as bounce fill (free)

  • A practical lamp in the background with a daylight bulb

Prices drift, so check current numbers. At the prices I paid, the whole kit came to about $150.

Budget Reality: The gap between clean footage and noise is usually one 60W-class LED, a sheet of white foam core, and a daylight bulb in a practical. Spend your first $150 on light, not on a new body.

Top-down lighting diagram for budget slow motion video setup with key light, white bounce, and background practical with distances marked

Why won’t a rental camera fix a dark location?

On a client project, we blew $900 renting a camera that could shoot 240fps. It looked incredible in the rental house test room.

On location, in a dimly lit warehouse, we got about 30 seconds of usable footage before the noise looked like VHS from 1987. The intern’s GoPro, mounted near a work light we already had on set, gave us cleaner slow motion. The light was doing the work, not the sensor.

My rule of thumb: if most of your slow motion will be indoors or in low light, put at least half of your upgrade budget into lighting before you buy a new body.

For the fundamentals of key, fill, and backlight, read our key lighting for beginners guide.

What Frame Rate Should You Use for Slow Motion?

Start at 60fps, move to 120fps for hero shots, and use 240fps only for single effect moments. At 24fps playback, 60fps gives you 2.5x slow motion, 120fps gives 5x, and 240fps gives 10x. The light you need climbs with every step.

Frame Rate Slow-Mo at 24fps Playback Slow-Mo at 30fps Playback Light Requirement Best Use
60fps 2.5x 2x Moderate Documentary B-roll, gentle motion, safe default
120fps 5x 4x High Water droplets, fabric ripples, hero shots
240fps 10x 8x Extreme Shattering glass, close-up impacts, single effect shots

Why can't 24fps footage be saved in post?

When you slow 24fps footage down, software has to invent frames that were never captured. Even good interpolation can't fix that. It's like trying to make a flipbook smoother after you've bound it. The gaps are baked in.

Your storage math card — the GB/min = Mbps × 0.0075 formula with the 400Mbps = ∼43 min on a 128GB highlight, perfect for saving and sharing.

What are 60, 120 and 240fps each good for?

60fps is where most people should start. File sizes stay manageable, most cameras from 2018 onward can do it, and you get noticeable slow motion without stadium lighting.

120fps is the sweet spot for hero shots. Water droplets become small explosions and fabric ripples become visible. You'll need bright light, or you'll push ISO until noise becomes a character in your footage.

240fps is for specific effect shots, not scenes. I've used it twice: once for a coffee cup shattering, once for a close-up of hands catching a falling object. Both took three LED panels at full blast, because the shutter was fast enough to be photographing with a strobe.

How much storage does slow motion take?

Storage depends on your camera's bitrate, not just the frame rate. The formula: gigabytes per minute equals megabits per second times 0.0075.

Bitrate GB per Minute Minutes on a 128GB Card
100 Mbps 0.75 ~170
200 Mbps 1.5 ~85
400 Mbps 3 ~43
800 Mbps 6 ~21

Look up your camera's bitrate for the exact mode you'll shoot. An All-Intra mode can land in the 400Mbps range. A long-GOP mode is far lighter.

Production Reality: At 400Mbps, a 128GB card lasts about 43 minutes, and a card dump mid-shoot costs you light. Do the card math before the call time, not at the card swap.

180-degree shutter rule graphic for slow motion video showing 90° vs 180° vs 360° shutter angles with motion blur examples and Saving Private Ryan staccato look

What Shutter Speed Do You Need for Slow Motion?

Set your shutter speed to double your frame rate: 1/120 at 60fps, 1/240 at 120fps, and 1/480 or 1/500 at 240fps. This is the 180-degree rule, and it keeps motion blur looking natural. Break it only when the content earns it.

Frame Rate Recommended Shutter Speed
60fps 1/120
120fps 1/240
240fps 1/480 or 1/500

Go slower and everything gets soupy. Go faster and you get the staccato look of the Saving Private Ryan beach landing, which works for combat and looks wrong for flowing water or hair.

Common Beginner Mistake: Cranking shutter speed past 1/500 because you have extra daylight destroys motion blur. Unless you're shooting fight choreography, where the staccato violence is the whole point, stick to the 180-degree rule.

Note for Blackmagic shooters: On a BMPCC or URSA you set shutter angle, not shutter speed. 180° is your baseline, and it adjusts automatically as you change frame rate. Drop to 90° for a staccato look, but expect your light needs to double.

When should you break the 180-degree rule?

When the content wants the stutter. A fight beat at 120fps with a 1/500 shutter reads sharp and disorienting, because the stutter matches the violence. For everything else, follow the rule.

For more on shutter mechanics, read our guide to shutter speed and shutter angle.

8-bit vs 10-bit banding comparison for slow motion video showing sky gradient pushed in grade side-by-side

Which Camera Settings Matter at High Frame Rates?

Most cameras make you choose between 4K at 60fps and 1080p at 120fps. The bodies that do 4K 120p all carry a cost: a crop, heat, price, or a weak codec. Decide per shot whether frame rate or resolution matters more.

Production Reality: The spec sheet says 4K 120p. On set, the same body hands you a 1.5x crop, a heat warning after fifteen minutes, and a codec that quietly drops to 4:2:0. Read the fine print for the exact mode you plan to shoot, not the headline number.

What is the resolution versus frame rate trade-off?

A handful of bodies shoot 4K at 120fps, including the Sony A7S III, the FX3, the Canon R5, and the current Sony A7 V. The A7 V’s 4K 120p is cropped. Check each body’s crop and heat behavior against the manufacturer’s current spec sheet before you buy, because firmware updates move these goalposts.

The decision framework I use:

  • If the shot is a hero moment, prioritize frame rate.

  • If it’s B-roll that might run at normal speed, prioritize resolution.

  • If you’re not sure, shoot 60fps in 4K and test your computer’s ability to edit it before committing to a 240fps workflow.

Why does bit depth matter for slow motion?

Slow motion is often underexposed, and underexposed footage gets pushed in the grade. 8-bit gives you 256 shades per channel, and 10-bit gives you 1,024. The difference shows up as banding in skies and gradients.

Check which codec each frame-rate mode uses. Some high-speed modes drop to 4:2:0 or 8-bit, even on bodies that are 10-bit elsewhere.

That cold-air moment — checking the noisy 120fps clip in the shade, grain on the field monitor and breath hanging in the air.

What is a noise floor test, and why run it first?

Every camera has a native ISO where it performs cleanest. When you shoot slow motion with a fast shutter, you’re often forced above it.

On Going Home, the Komodo’s native ISO is 800. At 120fps with a 1/240 shutter in forest shade, I needed ISO 3200 for a proper exposure. The noise was unacceptable. We waited for brighter light and shot at ISO 800: still noisy, but gradable.

Test your camera at the ISO values you’ll need, such as 1600, 3200, and 6400, before you’re on set. Know where the image falls apart so you can plan your light around it.

Why does autofocus fall apart at 120fps?

Autofocus is the first thing to get unreliable at high frame rates. In my testing across the bodies I’ve operated, the Sony FX3 and the A7S III held autofocus most reliably at 120fps. Everything else hunted.

Even those two struggled with low-contrast subjects against a bright background. The fix from set is old and boring: pre-focus manually. Tape a mark on the floor and tell your subject to hit it. This is how film has done it for 100 years, because it works.

If you’re shooting something unpredictable, like sports, wildlife, or children, you need a body with proven high-speed autofocus, or a wider depth of field as insurance.

Here’s the flicker pair — 1/240 at 120fps showing the rolling bands under 60Hz mains, versus 1/120 (360° shutter) clean, with the light-intensity waveform and fix labeled.

How Do You Fix Flicker in Slow Motion?

Mains-powered lights flicker at 120Hz in 60Hz regions (100Hz in 50Hz regions), not at 60 or 50. At 1/50, your shutter averages over several light pulses and hides it. At 1/240, you sample single pulses and the banding rolls through the frame.

Community centers, gyms, and school halls are the classic trap. Everything looks fine in the room, and then every frame has horizontal bands rolling through it.

The 3-step flicker test

  1. Set the exact frame rate and shutter speed you’ll shoot.

  2. Record 10 seconds pointed at the practical lights and play it back on a real monitor. Rolling bands, or a pulsing waveform, mean you have flicker.

  3. If you see banding, swap to flicker-free lights, kill the practicals, or sync the shutter to the light.

Syncing in a 60Hz region means 1/120 at 120fps, which is a 360° shutter. It kills the banding but breaks the 180-degree rule, so you trade motion blur for a clean frame. In a 50Hz region, 1/100 at 120fps isn’t possible, because the shutter would be open longer than the frame exists. Drop to 100fps at 1/100 (360°), or accept partial flicker and swap to flicker-free lights.

Is outdoor light a free fix?

Bright daylight solves the light problem. It also gives you harsh shadows unless it’s overcast, no control over direction, and a limited window before the sun moves.

On a cloudless day you can get exactly one clean take before a cloud costs you two stops, and the next take won’t match. Shoot slow motion at the start or end of the day when light is stable, not at midday when clouds and sun create chaos.

Stabilization comparison showing how that tiny 24fps handheld jitter stretches into a visible 5x float at 120fps, proving why you need to lock it down.

How Do You Stabilize and Plan a Slow-Motion Shot?

Lock the camera down or move slowly, because 5x slow motion turns every wobble into a visible float. Pick the one moment that justifies slowing down and shoot only that. Shoot three takes: a 24fps safety, the high-frame-rate hero take, and a wide edit-insurance take.

Why does stabilization matter more at 120fps?

Handheld shake that’s barely visible at 24fps becomes a slow float at 120fps. On Going Home, I shot a slow-motion tracking shot through the forest handheld at 120fps. I thought I was being smooth. Playback looked like a shuttle launch.

The 120fps setups on that film I’d trust were the ones on a heavy Benro S6 Pro fluid head on aluminum legs. For organic handheld movement, I use a balanced shoulder rig, where micro-jitter gets absorbed by mass instead of digital stabilization. A fluid head is boring and it works.

Minimum stabilization: a tripod with a fluid head, a gimbal matched to your camera’s weight, or a shoulder rig with the weight sitting over your shoulder instead of hanging out in front of you.

If you must go handheld with nothing else, move slowly yourself. Your walking pace becomes a slow dolly move at 5x slow motion.

Dogonnit frisbee storyboard — normal 24fps throw, full 120fps with too much dead air, and the winning combo of normal pacing into that 0.8s 120fps leap.

What makes a shot worth slowing down?

Slow motion doesn’t make boring footage interesting. It makes interesting footage hypnotic and boring footage unwatchable. Before you hit record, ask what specific moment of impact, splash, reaction, or movement justifies slowing down.

On Dogonnit, a character throws a frisbee to a dog. We shot it three ways:

  1. Normal speed (fine, but forgettable).

  2. 120fps slow motion of the entire throw and catch (too much dead air).

  3. Normal speed for the throw, then 120fps for only the 0.8 seconds when the dog leaps and catches (this one made the final cut).

What Audiences Actually Feel: At the Soho screening of Going Home, the forest sequence answered it for me. Nobody in that room was thinking about frame rates or bit depth. They felt the tension because the slow motion held on the character’s hesitation for an extra beat, so the quiet moment registered before the cut.

What is the 3-take rule for action?

  • Take 1: 24fps safety take for real-time pacing.

  • Take 2: 60fps or 120fps for the hero slow-motion moment.

  • Take 3: A wide at 24fps as edit insurance.

Timing at high frame rates is brutal. What feels like a 2-second action in real time becomes 10 seconds at 120fps, and you’ll misjudge it. We shot 14 takes of the frisbee catch. Used one.

Step behind the scenes of the poignant film 'Going Home' as the director and actor engage in a candid conversation about the upcoming scene, showcasing the essential art of directing actors on set. Witness the collaborative process and how trust and communication play a pivotal role in capturing the emotional depth of the film on set.
Director and actor talking about the next scene for the film "going home"

How do you direct actors for slow motion?

Slow motion magnifies performance. Every micro-movement becomes a gesture and every glance becomes a stare. Give actors these notes before the first take:

  • Slow your movements by 30–40%. Not robotic, deliberate. Think Tai Chi, not statue.

  • Soften your eyeline. In slow motion, a normal eyeline can look like a soap-opera stare.

  • Hold the moment of impact. A catch, a drop, or a reaction needs an extra beat, which gives the editor more frames.

  • Keep breathing. Actors often hold their breath in slow-motion takes, and the performance goes stiff.

  • Rehearse at normal speed, then half speed, then shoot.

An actor who’s been standing in cold fog for four hours isn’t going to give you a fresh take, any more than a guest whose room isn’t ready is going to be reasonable at the front desk. You don’t argue with the mood. You solve the logistics: a warm jacket, a hot drink, five minutes to reset. The performance follows the logistics.

On Going Home, we rehearsed the actress’s walk toward camera three times at normal speed and twice at half speed before the 120fps tracking shot. The first take was too fast. The second was perfect. Without the half-speed rehearsal, we would have wasted the light.

That classic community-center trap — overhead fluorescents overhead and the laptop screen full of horizontal flicker bands with gaffer tape marking the floor.

How Do You Edit Slow Motion Without Choking Your Computer?

Generate proxies immediately after import. High-frame-rate H.264 and H.265 footage is heavy to decode, and a 10-minute timeline can turn a laptop into a slideshow. Use frame interpolation sparingly and only on simple motion.

Premiere and Resolve both generate proxies if you tell them to. Your editing experience goes from torture to tolerable.

Common Beginner Mistake: Cutting 120fps H.265 straight off the card on a laptop, then blaming the laptop when playback stutters. Generate proxies on import. The camera didn’t make bad files. The workflow did.

I once spent the better part of a day hand-tracking a soft 120fps shot through a busy background, convinced I could rescue it with enough keyframes. The footage wasn’t sharp enough to track and never would be. The fix was three seconds of deciding to cut the shot, which I should have done before lunch.

When does Optical Flow work, and when does it lie?

Optical Flow is built-in frame interpolation in Premiere and Resolve. It is not the same as Frame Blending, which just cross-fades neighboring frames, and it is not Twixtor, which is a separate paid plugin.

It works okay for slow pans across landscapes, simple motion on clean backgrounds, and shots where you’re adding motion blur anyway.

It fails on fast, complex motion like hands and faces, fine detail like hair and water, and subjects crossing a busy background.

I’ve used it on edits where we didn’t have time to reshoot. On one, an actress’s hair turned into ghosting artifacts that looked like a cheap horror effect. We kept it because the alternative was cutting the scene. I know it’s there.

Does Slow Motion Need Sound Design?

Yes. Slow motion with natural sound feels incomplete, and slowed-down sync sound feels broken. Replace it with designed audio: a stretched low effect, a rumble underneath, and silence before the reveal.

On Noelle’s Package, a 48-hour competition film, the first cut of a slow-motion box opening had no sound design and felt flat. With the clock running, we spent our limited audio time on that moment.

We added a low, stretched-out creak for the lid, a subtle bass rumble underneath, and silence before the reveal. The scene went from fine to the part we’d keep.

Free tools: Freesound.org for effects, and Audacity to time-stretch audio and pitch it down.

Netflix-approved cameras

Which Cameras Are Best for Slow Motion, and Who Shouldn't Buy Them?

For most people, the best slow-motion camera is the body you already own plus a $300 LED panel. If you are buying, match the body to the frame rate you actually need: 1080p 120p is cheap, and 4K 120p costs a crop, heat, or money. Verify specs on the manufacturer's page before you spend.

Specs and prices change with firmware and new releases. Treat the table below as a starting point and confirm each model against its current spec sheet and street price.

Camera High-Speed Modes Hidden Limitation Best For Skip It If
Sony A7 IV 4K 60p (1.5x crop), 1080p 120p No 4K 120p Hybrid shooters whose slow motion is 1080p 120p You need 4K 120p or 240fps
Sony A7 V 4K 60p oversampled, 4K 120p (1.5x crop), 1080p 240p. Confirm against Sony's official firmware spec sheet. 4K 120p is cropped Hybrid shooters who want 4K 120p You need full-frame width at 120p
Sony A7S III 4K 120p, 1080p 240p 240p is a slow-and-quick mode: no audio, and softer than 4K 120p Low-light and documentary work You need high resolution stills
Canon EOS R5 4K 120p Thermal limits on long takes; the R5 Mark II also exists Hybrid photo and video You need long continuous takes
Panasonic GH6 4K 120p, 1080p 240p Autofocus unreliable at high frame rates; the GH7 succeeded it Manual-focus slow-motion specialists Your subject needs autofocus
GoPro HERO13 2.7K 240p Small sensor, noisy indoors; check for a newer model Action and travel in daylight You shoot dim interiors

Where does the Sony A7 IV fit now that the A7 V exists?

I’ve operated the A7 IV. The A7 V I haven’t run, so treat that row as a spec-sheet read, not a field report. My hands-on inventory includes the Sony FX3, A7S III, A7 IV, BMPCC 6K Pro, RED Komodo, and Fujifilm X-H2S.

The A7 IV caps at 4K 60p with a 1.5x Super35 crop and 1080p 120p. The current A7 V adds 4K 120p, also with a 1.5x crop, plus 1080p 240p, per Sony’s published specs. Confirm those numbers on Sony’s page before you buy, because firmware and regional model differences have a way of rewriting spec tables. If 4K 120p is a hard requirement, the A7 IV is out.

If your slow motion lives at 1080p 120p, the A7 IV on the used or discounted market does the job. Who shouldn’t buy it: anyone who needs 4K 120p or 240fps, or who shoots in light dimmer than a parking garage at dusk, where the A7S III earns its price.

Honest downside: Sony’s menus are designed by someone who hates filmmakers. Expect to lose 20 minutes finding the frame-rate and slow-and-quick settings the first time.

Budget slow motion video lighting kit in small apartment set with white foam core board, 60W LED on stand, and daylight desk lamp with gaffer tape and cables

What Other Gear Is Worth Buying for Slow Motion?

Buy light first, then fast glass, then stabilization, then ND filters. A cheap lens at f/1.8 beats an expensive lens at f/4 in a shutter-speed war.

Why does aperture beat sharpness for slow motion?

A $200 lens at f/1.8 gives you cleaner slow motion than a $1,200 lens at f/4. The wider aperture lets in more light, which matters more than resolving power when you’re fighting the shutter.

Safe bets: a 50mm f/1.8 (most brands make one for under $250), and a 24-70mm f/2.8 if you need zoom flexibility. Who should skip it: anyone shooting only outdoors at midday, where a variable-aperture zoom is fine.

Do you need a gimbal or a tripod?

A gimbal gives you moving shots, but it takes practice and it has to match your camera’s weight. Get it wrong and your footage looks like someone doing Tai Chi after a long night.

Cheaper option: a $40 tripod and patience. Most slow-motion shots don’t need to move. Who should skip a gimbal: anyone who hasn’t yet shot a locked-off slow-motion shot that works.

Why do you need ND filters?

Shooting at 1/240 in daylight will blow out your image even at the lowest ISO. ND filters are sunglasses for your lens. Variable NDs let you dial in the exact reduction. Fixed NDs are cheaper but less flexible.

I didn’t buy an ND filter until my third short film. I should have bought one on day one. Who should skip it: anyone shooting only indoors.

What lighting is worth the money?

Under $200: a 60W-class LED such as the Godox SL60W, plus white foam core for bounce. This saved multiple indie shoots. Who should skip it: anyone who needs more than 60W as a key, or who is lighting a room bigger than a bedroom.

Budget Reality: A $120 Godox SL60W bounced off an $8 white foam-core board delivers cleaner 120fps slow motion than a $4,000 body cranked to high ISO in a dim room.

The next step up: the Aputure 120d line (check which generation is current). It’s an industry standard for a reason. Who should skip it: anyone who hasn’t yet run out of power on a 60W key.

Free: windows. Shoot near them, and use shower curtains as diffusion.

For a complete budget kit, see our guide to building a filmmaking gear kit for less than $1,000.

What Slow-Motion Mistakes Show Up on Set Every Time?

The same four mistakes sink most slow-motion shoots: trusting post to fix bad light, trusting autofocus, ignoring storage math, and forgetting audio. All four are avoidable before you hit record.

  • The “We’ll Fix It in Post” Lie: If your footage is underlit and noisy at 120fps, no amount of noise reduction will save it. Heavy denoising makes footage look like an oil painting.

  • The Autofocus Trust Fall: Trusting autofocus at 120fps on a camera that struggles at 24fps is how you get six minutes where the subject is soft and the background is sharp.

  • The Storage Surprise: A card fills faster than you expect. At 400Mbps, a 128GB card is gone in about 43 minutes. Do the math before the call time.

  • The Forgotten Audio: Slowed-down sync sound sounds like a demon choking on gravel. Plan to replace the audio with sound design or music.


Key Takeaways

  • Slow motion at 120fps with a 1/240 shutter costs about 2.3 stops of light, so light first and buy the camera second.

  • Set your shutter to double your frame rate, and break the rule only when the content earns it.

  • Mains-powered lights flicker at 120Hz in 60Hz regions, so test your lights at your exact frame rate and shutter before you shoot.

  • Work out storage from your camera’s bitrate, not from a rule of thumb.

  • Slow only the moment that earns it, and shoot a 24fps safety take.

  • Verify camera specs on the manufacturer’s page. They change with firmware and new releases.

Dim warehouse set for slow motion video with single work light, GoPro taped to stand, extension cord across concrete floor, and empty rental camera case

FAQ Section: Slow Motion Video Guide

Can I shoot slow motion on my iPhone or Android phone?

Yes. Most phones from 2020 onward shoot 1080p at 120fps, and many offer 240fps. The iPhone 16 Pro line introduced 4K 120fps recording, so check your specific device’s settings and spec page before assuming you have it. Small sensors need real light, which is why phone slow motion works outdoors and struggles indoors. For more, read our guide to shooting slow motion on a smartphone.

Use 1/240 shutter speed for 120fps to maintain the 180-degree shutter rule. This gives you natural motion blur. If you’re using a Blackmagic camera, set your shutter angle to 180° and it will automatically adjust. Only go faster (1/500 or higher) if you want the staccato, Saving Private Ryan look for action or combat scenes.

At 120fps in 1080p using H.264 compression, expect about 3GB per minute. At 240fps, that can jump to 5–6GB per minute. A 10-minute shoot at 120fps will fill a 32GB card. Always bring more storage than you think you need, and dump footage to a laptop or external drive between setups if you’re doing long takes.

Yes, unless you’re shooting in bright daylight. At 120fps, your shutter speed is 1/240, which cuts light intake by about 80% compared to normal 24fps shooting. Without additional lighting (LED panels, reflectors, or shooting near windows), your footage will be underexposed and noisy. A single $120 LED panel can make the difference between clean footage and unusable noise.

Yes, but you need serious light. At 240fps with a 1/480 shutter you lose about 3.3 stops versus 24fps, which means three LED panels at full blast in a small room. If you don’t have that light, shoot 120fps and slow it further in post.

Conclusion

To shoot slow motion video that holds up, set 120fps with a 1/240 shutter, light the scene for the 2.3 stops you just gave up, and stabilize the camera. The camera body matters less than the light reaching it.

On set, the cost isn’t the gear. It’s the schedule: the lost fog on Going Home cost us $800 and four hours. Rental cameras, noise-reduction plugins, and frame interpolation can’t recover light or frames you never captured.

If you’re just starting, shoot 60fps in bright light until the shutter and light relationship is automatic. If you’ve already come back with dim, noisy 120fps footage, reshoot that one shot with a single LED panel before you spend anything on a new body. Slow motion doesn’t slow time. It makes the audience look longer at whatever you’ve already decided is worth looking at.


soho international film festival theatre 2024
Director/Producer Trent Peek poses for a selfie in front of the theatre that is showing his film, Going Home.

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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.

🎙️ Featured Interview

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.
🔗 Connect With Trent
For more behind-the-scenes content, find Trent on YouTube and Instagram @trentalor.

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