For more on this, read our guide on what shutter speed to use for filming moving subjects. The blur actually helps with smoothness of playback. Motion blur is important for video as it helps with that all-important persistence of vision. Shooting a frame at 1/120th of second is going to eliminate any motion blur, whereas shooting at 1/60th will give motion blur in the frame. At 29.7fps it’s relatively easy to find a balance of gain (ISO) and IRIS (Aperture) to enable that all-important 1/60th shutter speed.īut, crank that to 60fps and you suddenly need a shutter speed of 1/120th – and that’s quite a jump. This dictates that the fps should always be half of the shutter speed. You need to think about the 180-degree shutter rule. This is where the technical aspect comes in. Let’s move on to why you shouldn’t always film at 60fps – even though looking at the basics it would seem sensible. Now we begin to understand why you would film 4K at 120fps. If you want slow motion, then increase the fps to cover the number of frames that you need.įor normal playback at 29.7fps, half-speed you will need 60fps, quarter speed you’ll need 120fps etc. If the footage you’re shooting is going to played back at a standard 29.7fps then film at that standard fps. However, shooting at 60fps all the time is far from ideal.īefore we go into why, it’s worth pointing out that you should always film at the frame rate you need. Using this line of thought you’d think that always filming at 60fps would be a good idea, as you can halve its playback speed and mix it with standard 29.7fps footage as needed. That’s not enough, especially at 4K, so you end up with everything looking kind of staccato – to borrow a musical term. If you try the same with footage shot at 30fps and slow it down to half speed, then you have to stretch 29.7 frames over 2 seconds – essentially 15 frames per second. This is perfect for the visual effect of scene-setting. Footage shot at 60fps that is slowed to 29.7fps enables you to stretch 1 second of footage over 2 seconds.
But while it can, and is commonly, it’s not ideal and we’ll tackle that in a bit. This way, 60fps footage can easily be mixed with 29.7fps footage. You can also output that footage at 29.7fps, which is the standard playback frame rate. Shooting at 60fps simply gives you the ability to slow down footage to half speed so you can get that scene-setting slow-motion effect. Let’s begin first by examining the benefits of shooting 4K at 60fps. Why do people want these higher frame rates? As technology has advanced, some are now seeking out cameras that shoot 4K at 120fps. In recent years many photographers and filmmakers have sought out cameras that shoot 4K video at 60fps. Which cameras can shoot 4K video at 120fps? From interchangeable lens cameras like the Canon EOS R5 to smartphones like the Samsung Galaxy S20 Ultra to 360 VR options from Kandao, we’ve rounded up the best consumer cameras for 4K 120p footage to help with your filmmaking.īut first, let’s take a look at why you would want to shoot 4K at higher frame rates. The best cameras for shooting 4K 120fps video
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