Shooting compelling slow motion video isn’t just about cranking up your camera’s frame rate. It’s about a combination of specific camera settings and techniques that deliver that silky smooth, impactful look. You’ve seen it used effectively in everything from intense action sequences to emotional, character-driven moments. Knowing how to shoot slow motion video correctly will elevate your filmmaking significantly. It’s a fundamental skill, and mastering it starts with understanding the basics of frame rates and shutter angles.

Forget any idea that slow motion is a magic bullet for every scene. It’s a tool. Use it intentionally, and your audience will feel the punch. Misuse it, and your footage will just look… weird.

The Foundation: Frame Rates and Playback Speed

The core of slow motion is capturing more frames per second (fps) than your project’s playback speed. When you play back 120 frames captured in one second over five seconds (at a standard 24fps playback), you get a five-times slow-down. Simple math, but it’s where many beginners get tripped up.

Your project’s timeline frame rate is almost always 24fps for cinematic narrative work, or 30fps for broadcast television and some corporate video. If you want slow motion, you need to shoot at a frame rate higher than that.

Here are the common frame rate options and what they mean for slow motion:

• 48fps: Double your playback, gives you 50% speed. Good for a subtle slow-down.
• 60fps: 2.5 times slower at 24fps playback, or 50% speed at 30fps playback. This is a very common sweet spot for a noticeable, but not extreme, slow motion effect. Most modern cameras, even entry-level DSLRs and mirrorless models like the Sony a6400 or the Canon R10, can easily hit 60fps in Full HD or even 4K.
• 90fps: 3.75 times slower at 24fps playback. A more pronounced slow-down.
• 120fps: Five times slower at 24fps playback. This is classic “bullet time” territory, great for action or highlighting intricate details. Many cameras, from a Panasonic GH5 to a Blackmagic Pocket 4K, offer this in Full HD. Some higher-end cameras can even do 120fps in 4K.
• 240fps or higher: Ultra slow motion. This is where you see water droplets splash in intricate detail or a balloon bursting. Requires more specialized cameras like a Sony FS7 or a Phantom Flex.

Practical Tip: Always shoot at the highest frame rate available that matches your desired aesthetic and resolution. If you want a significant slow down, shoot 120fps. If you just want to smooth out some minor camera shake or subtly emphasize a movement, 60fps might be enough. Trying to create slow motion from 24fps footage in post-production with optical flow interpolation rarely looks as good as natively shot high-frame-rate footage.

Shutter Speed for Slow Motion: The 180-Degree Rule Still Applies

This is where many people mess up when learning how to shoot slow motion video. The 180-degree shutter rule is crucial. If you’re shooting at 24fps, your shutter speed should be 1/48th of a second (or 1/50th if your camera doesn’t offer 1/48th). This gives motion blur that feels natural to the human eye.

When you shoot at higher frame rates for slow motion, you still want to maintain that relative 180-degree shutter angle for each frame. This means:

• For 60fps: Your shutter speed should be 1/120th of a second.
• For 120fps: Your shutter speed should be 1/240th of a second.
• For 240fps: Your shutter speed should be 1/480th of a second.

Why is this so important? If your shutter speed is too fast (e.g., 1/1000th of a second at 120fps), each individual frame will be razor-sharp with no motion blur. When you play that back slowly, the individual frames become obvious, creating a jarring, strobing effect. It looks digital and unnatural. Think of the opening scenes of Saving Private Ryan — the intentional use of a faster shutter (around 1/250th) creates that harsh, hyper-real, chaotic feel. That’s a deliberate creative choice, but usually not what you want for smooth slow motion.

If your shutter speed is too slow (e.g., 1/60th at 120fps), you’ll get excessive motion blur. Each frame will smear, and when played back slowly, the motion will be indistinct and muddy.

What about lighting? Shooting at higher frame rates and faster shutter speeds means less light hits your sensor. You’ll need more light, wider apertures, or higher ISO. This is where ND filters become your best friend. A variable ND filter or a set of solid NDs will allow you to control your exposure while keeping your aperture and ISO consistent and your shutter speed locked to that 180-degree rule. If you’re outside on a sunny day shooting 120fps at 1/240th, you’ll likely need a hefty ND filter to avoid overexposure, even at f/8 or f/11.

For precise control over your exposure and to ensure you’re nailing that 180-degree shutter angle, tools like FrameCoach can be invaluable. It gives you real-time feedback on your shutter, aperture, and ISO settings, making sure you don’t accidentally blow out your highlights or lose detail in your shadows, especially when you’re rapidly adjusting for different frame rates and ND filters.

Camera Settings Checklist for Slow Motion

Before you hit record, here’s a quick checklist of settings to confirm:

1. Frame Rate (HFR/S&Q Mode): Go into your camera’s menu and select the desired High Frame Rate (HFR) or Slow & Quick (S&Q) mode. On a Sony a7S III, for instance, you’d find this under the “Shooting Mode” dial or within the menu system. Don’t just set your project frame rate to 60p; you need to specifically activate the camera’s slow-motion recording mode. Most cameras bake in the slow motion effect during recording, meaning the file itself is already slowed down to your playback frame rate (e.g., a 120fps file that plays back at 24fps).
2. Shutter Speed: Set this to double your high frame rate. For 60fps, it’s 1/120th. For 120fps, it’s 1/240th.
3. Aperture (f-stop): Choose your f-stop based on your desired depth of field and exposure. Remember that shooting at faster shutter speeds means you might need to open up your aperture more than usual (e.g., f/2.8 or f/4 instead of f/8) or add more light.
4. ISO: Keep your ISO as low as possible to avoid noise, especially if you’re shooting in log profiles, which can show noise more easily.
5. Resolution: If your camera offers 4K at 60fps but only 1080p at 120fps, you need to decide which is more important: resolution or the degree of slow motion. For most uses, the higher frame rate for a greater slow down is often preferred, even if it means dropping to 1080p.
6. ND Filters: Absolutely essential for shooting slow motion outdoors or in brightly lit environments. You’ll likely need heavier NDs than you’re used to, often ND.6, ND.9, or even ND1.2 (2-stops, 3-stops, 4-stops).

Practical Tip: Always do a test shot. Record a few seconds, play it back on your camera’s LCD (or external monitor), and make sure the motion blur and overall look are what you intended. Don’t wait until you’re in the edit suite to find out your slow motion looks like a flipbook.

What to Shoot in Slow Motion

Knowing how to shoot slow motion video is one thing, but knowing when to use it is another.

Slow motion excels at:

• Emphasizing impact: A punch, a jump, a crash.
• Highlighting detail: Water splashing, dust particles catching the light, intricate hand movements.
• Creating drama or tension: A character’s slow turn, a moment of realization.
• Capturing things too fast for the eye: Sports, wildlife, explosions.
• Enhancing beauty: Flowing fabrics, hair blowing in the wind, a dancer’s movements.

Avoid using slow motion for dialogue scenes or static shots that don’t benefit from the effect. It draws attention to itself, and if there’s no good reason for it, it becomes distracting. Remember the goal is to make your film better, not just to show off that your camera can shoot 120fps.

Even with some of the recent attention on DSLRs getting firmware updates, and older camera models still being perfectly viable, the principles of how to shoot slow motion video remain universal. Whether you’re rocking a brand new mirrorless camera or an older Canon 5D Mark IV, these settings are the bedrock.

Post-Production Considerations

Once you’ve nailed your in-camera settings, your post-production workflow for slow motion is usually straightforward:

1. Import Footage: Get your high-frame-rate footage into your editing software (Premiere Pro, DaVinci Resolve, Final Cut Pro).
2. Interpret Footage (if necessary): Some cameras, like certain Blackmagic models, record “raw” high frame rate footage that needs to be interpreted in post. This means you tell the editing software what playback frame rate to apply (e.g., interpret 120fps footage at 24fps). Many cameras, especially those in HFR/S&Q mode, bake this in, so the file already plays back slowly.
3. Place on Timeline: Drop your slow-motion clip onto your 24fps (or 30fps) timeline.
4. Adjust Speed (if not pre-slowed): If your camera didn’t pre-slow the footage, you’ll need to adjust the clip speed. For example, a 120fps clip on a 24fps timeline would be set to 20% speed (24/120 = 0.2).
5. Color Grade: Apply your usual color grading and correction. Slow motion can often highlight subtle details, so pay extra attention to your highlights and shadows.

Using a consistent workflow will save you headaches. If you’re ever unsure about your exposure while filming high frame rates, use FrameCoach. It’s like having an experienced D.P. whispering in your ear, confirming that your aperture, shutter, and ISO are all working together to get the best possible image, especially when you’re pushing your camera in challenging lighting conditions.

Knowing how to shoot slow motion video is a fundamental skill that takes practice. Don’t just understand the numbers; understand the feel of the motion blur, the light requirements, and the storytelling impact. The next time you’re on set, specifically plan for a slow-motion shot, and apply these settings. You’ll see an immediate improvement in the quality and impact of your footage.