For most video work, manual mode is the better choice because it keeps your shutter speed fixed and your motion looking consistent. Aperture priority can still help when light changes quickly and you have no time to adjust, but it lets the camera change the shutter speed, which can make footage look uneven.
How Each Mode Behaves in Video
In aperture priority, you set the f-number and the camera chooses the shutter speed (and often ISO) to keep the exposure steady. In manual mode, you set aperture, shutter speed and ISO yourself, and nothing shifts unless you change it.
In stills, a changing shutter speed hardly matters. In video, it changes how motion blur looks from one moment to the next. A shot that drifts between sharp-looking and smeared-looking movement can feel off to viewers.
The Shutter Speed Rule for Video
A widely used guideline is the 180-degree rule: set the shutter speed to roughly double the frame rate. At 24 frames per second that means about 1/50, and at 30 frames per second about 1/60. These are guidelines rather than laws, and you can deviate for a stylistic look.
- Faster shutter speeds give a choppy, crisp motion feel.
- Slower shutter speeds give heavier blur and a softer look.
- Switching between them mid-clip is rarely what you want.
When to Choose Each
| Situation | Better mode | Why |
|---|---|---|
| Interviews and planned shoots | Manual | Stable exposure and matching clips |
| Cinematic b-roll | Manual | Controlled motion blur |
| Fast run and gun events | Aperture priority | Camera adapts to changing light |
| Walking from indoors to outdoors | Manual with auto ISO | Fixed shutter, flexible exposure |
A Practical Middle Path
Many shooters use manual mode with auto ISO. You fix the aperture and shutter speed, and the camera adjusts only ISO to hold the exposure. Check that your camera allows this in video mode, since behavior differs between models.
- Set your frame rate first.
- Set the shutter speed to about double the frame rate.
- Choose an aperture for the depth of field you want.
- Use an ND filter in bright light instead of raising the shutter speed.
- Set a maximum ISO so noise stays acceptable, then check the result on a larger screen.
FAQ
Does aperture priority ruin video?
No. It simply gives you less control over motion blur. For a quick clip of a family event, the result can look perfectly fine.
Why does my footage flicker indoors?
Some artificial lights pulse, and certain shutter speeds clash with them. Try matching the shutter speed to your local mains frequency or changing the lighting.
The Short Version
Choose manual mode, ideally with auto ISO, when you want consistent, professional-looking footage. Choose aperture priority only when conditions change too fast to manage by hand. Treat the settings here as general guidance and adjust to the scene.
