Shutter angle vs shutter speed: video settings that hold up

Quick answer: Shoot video at a 180° shutter angle, which means a shutter speed of roughly double your frame rate (1/48 or 1/50 s at 24 fps, 1/60 s at 30 fps, 1/120 s at 60 fps). If your camera lets you display the shutter as an angle, switch to that and the number follows your frame rate for you. If it only shows speeds, work it out from the table below and break the rule only on purpose.

What you need and how long it takes

You need any mirrorless body that records video with manual exposure, and about 20 minutes to read this and run the setup once. Expect a day or two of real shooting before changing the shutter at every frame-rate switch becomes habit.

The only prerequisite is manual or shutter-priority video exposure. If your camera is locked to full auto in video mode, none of this applies until you leave it.

What shutter angle measures

Shutter angle comes from film cameras with a rotating disc. As PolarPro and DFI Rentals both explain, the open wedge of that disc, measured in degrees of a full 360° circle, set how long each frame was exposed. A disc with exactly half open was a 180° shutter.

Digital cameras have no disc, so the angle is just the exposure time expressed as a fraction of one frame interval. Shutter speed is the actual exposure time in seconds. Cinema cameras tend to use angle because it stays consistent when you change frame rates, while photo cameras use speed because a stills camera has no frame rate to reference, as the Shutter Angle calculator at I Hit The Button puts it.

The conversion, per DFI Rentals: shutter angle = 360 × frame rate × shutter speed in seconds. At 24 fps, 360° is 1/24 s (maximum blur), 180° is 1/48 s and 90° is 1/96 s.

Wikipedia’s rotary disc shutter entry points out that the common 1/50 s at 24 fps works out to about 173°, which is close enough to 180° that nobody will see the difference. That’s why the “1/50 if 1/48 is missing” advice is sound.

Why the angle is the safer setting

Tools for Film describes the practical gap. Set a camera to 180° and change frame rate, and it recalculates the speed. Set 1/50 s and change frame rate, and the speed stays put while the angle drifts, so the character of the motion blur changes with it.

Take a documentary operator who goes from 25 fps interviews to 100 fps crowd shots with the shutter left at 1/50 s. That footage will look wrong, even though the exposure is technically fine. In Tools for Film’s example the 100 fps case happens to land on 1/100 s only if you change the speed yourself.

Slow motion is where this bites hardest. The I Hit The Button calculator advises keeping 180° for slow motion (1/120 s at 60 fps, 1/240 s at 120 fps) and warns that going wider usually gives too much blur once the clip is conformed to 24 fps playback.

Shutter speed at a 180° angle, by frame rate

Step by step: setting the shutter for a clip

Choose the frame rate first. The shutter depends on it, so lock it before touching anything else. A shoot at 24 fps for the final edit with a 60 fps slow-motion option should use 24 fps for normal clips and 60 fps for the slow ones.
Set exposure to manual (or shutter priority) for video. Sony’s help guide for the FX30 notes that Angle is active in Shutter Priority and Manual Exposure modes, and in flexible mode only when the shutter speed is set to Manual.
Switch the display to angle if the camera allows it. Menu paths are in the next section.
Dial in 180°, or the speed from the table if you only have speeds. Use 1/50 s when 1/48 s is missing from the list.
Check the lights. If you’re indoors, look for banding on the monitor. The flicker section below has the safe values.
Fix exposure with aperture, ND filters and ISO, not the shutter. Locking the shutter means exposure comes from those three, as Flashboards notes. In bright daylight at 1/48 s, that usually means a variable ND filter.

Where to find it on real cameras

Support is uneven. A ProVideo Coalition piece quoting Canon’s Paul Hawkhurst says shutter angle as an option is one of the key differences between Canon’s mirrorless and DSLR line and its Cinema EOS cameras. The same divide applies to Sony: that article lists the A7 IV as speed-only and the FX6 as offering both. Check the current firmware notes for your body, since that article is from 2023.

Camera	Shutter angle?	Where to set it
Sony FX30 (firmware 5.00 or later)	Yes	MENU → Exposure/Color → Exposure → Shutter Mode → Angle
Sony FX3	Yes, via a firmware update	Videomaker reports the update added angle as an option instead of speed
Sony FR7	Yes	[Shooting] > [Shutter] > Mode, Speed or Angle (default is Speed)
Sigma fp2	Yes, default in Cine mode	Top-plate switch to Cine position, which engages a separate video interface
Sony A7 IV, Canon EOS R series	Speed only (per ProVideo Coalition, 2023)	Use the speed values in the table below

Two details from Sony’s own pages are worth knowing. The FX30 stores Speed and Angle separately, so after you switch between them you’ll need to reset the value to get the exposure you expect. And on the FX30 the angle range for normal movies runs from 5.6° up to 64F, while slow and quick motion go from 5.6° to 360°.

On the Sigma fp2, Amateur Photographer reports that the Cine position brings in shutter angles and T-stops in place of shutter speeds and f-stops. PetaPixel’s review adds that the camera gives you waveforms and a 180-degree shutter angle among its assist tools. The fp2 has no mechanical shutter, which matters for flicker (see below).

Settings by situation

Situation	Frame rate (fps)	Shutter angle (°)	Shutter speed (1/x s)
Standard cinematic look	24	180	48 (50 if 48 is missing)
25 fps broadcast regions	25	180	50
30 fps web video	30	180	60
Smooth 60 fps	60	180	120
Slow motion conformed to 24 fps	60	180	120
Slow motion, high speed	120	180	240
24 fps under 50 Hz lights	24	172.8	50
24 fps under 60 Hz lights	24	144	60
60 fps under 50 Hz lights	60	216	100
Crisp, jittery action	24	90	96

The flicker rows come from Tools for Film and Urban Video’s safe-shutter tables. The 90° row follows from the formula above and from the guidance in RED’s tutorial, covered next.

Breaking the rule on purpose

RED’s shutter angle tutorial describes both directions. Go wider than about 180° and motion looks smeared, because the blur in one frame runs closer to the start of the blur in the next. Go narrower and the gap between blurs grows, so frames start to look like discrete images and motion turns staccato.

PolarPro gives a film example: a 45° angle at 24 fps for fast action, such as an explosion, where the abrupt look reads as more realistic. For a dreamy shot, McBain Camera suggests 1/25 s or slower at 24 fps; for a hyper-real action look, 1/100 s or faster.

McBain also makes a practical point about interviews. The blur effects show mostly in moving shots, so a static sit-down that’s short on light can drop a stop or two on shutter speed and you’d rarely notice. Treat that as a last resort, not a default.

Flicker: where 180° fails

Mains-powered lights pulse at twice the supply frequency. Photography Icon states that means 100 times a second on 50 Hz supplies and 120 times a second on 60 Hz. A shutter speed that spans whole flicker cycles removes most of the problem: 1/100 or 1/50 s in 50 Hz regions, 1/120 or 1/60 s in 60 Hz regions.

The awkward result is that the classic 1/48 s is not flicker-safe on either grid. Tools for Film’s calculator flags 1/48 s as not safe and suggests 1/60 s (144°) as the closest safe value under 60 Hz. Its example of a US crew shooting 24 fps in London saw banding at 1/48 s, which disappeared when they switched to 1/50 s (172.8°).

Cameras don’t always give you the exact number. Photography Icon notes that many bodies show 1/125 rather than 1/120 s; on a 60 Hz supply 1/125 is close enough to help, while 1/60 is exact.

Shutter type matters too. Photography Icon warns that the slow readout of an electronic shutter turns flicker into hard stripes, so use the mechanical shutter indoors unless you need silence. Video modes don’t give you that choice, which is the reason a faster-scanning sensor gets attention. PetaPixel’s fp2 review says its partially stacked sensor reduces rolling-shutter issues, which matters because there’s no mechanical shutter in that camera.

Common mistakes and fixes

Leaving the shutter at 1/50 s while changing frame rate

The speed stays fixed and the angle changes, so a slow-motion clip shot at 1/50 s and 120 fps has an angle of about 600° in spirit but physically can’t exceed one frame interval, so the camera will force something else. Use the table: 1/240 s at 120 fps. Better still, switch to angle where available.

Switching between Speed and Angle mid-shoot on a Sony

Sony says the two values are stored separately. After the switch, check the exposure and reset the value before you roll.

Using 1/48 s under LED or fluorescent panels

Banding rolls through the frame. Move to the nearest safe value in the table (1/50 s on 50 Hz, 1/60 s on 60 Hz) and check on a big monitor rather than the rear screen.

Fixing bright daylight by raising the shutter

This gives you jerky motion. Add an ND filter or stop down, and leave the shutter alone. For a quick fix on a single static clip it’s acceptable, but pan the camera afterwards and you’ll see the stutter.

Assuming your camera has an angle option

Many hybrid bodies show speed only. If you can’t find the item, you probably don’t have it; write the speeds from the table on a piece of tape on the camera strap instead.

What this means for you

Best for cinema-line and Sigma fp2 users: switch the display to angle, set 180°, and leave it there for everything except flicker-affected rooms. On a Sony FX30, update to firmware 5.00 or later first.

Best for speed-only mirrorless bodies: print the table above. For 24 fps in a 50 Hz country, 1/50 s is both the flicker-safe value and a 173° shutter. In 60 Hz countries, 30 fps at 1/60 s is the easy match; at 24 fps pick 1/48 s outdoors and 1/60 s under artificial light.

Best for slow motion: set 60 or 120 fps, then 1/120 or 1/240 s, and conform to 24 fps in your editor.

Whatever you shoot, check your camera’s current manual or firmware notes, because menu names and options change between updates.