I wanted to check the settings for shooting in slow motion on my camera, the Sony PXW- FS7.
The best way of achieving a slow motion effect in a moving image is to shoot at 50fps and slow it down to 25fps in post production, giving a smooth 50% reduction in speed. This is a much better approach than simply reducing the speed of footage that has already been captured at the camera’s normal recording speed of 25fps, which can look rather jerky on screen.
One of the exciting things about the FS7 is the high frame rate capabilities of the camera. Recording internally, it can shoot at a top speed of 50fps in Ultra High Definition (2160p) and 150fps in High Definition (1080p). To get the highest frame rates possible, the codec needs to be set to XAVC-I.
The S&Q Motion (Slow & Quick Motion) settings are available through Assignable Button 1, indicated ‘S&Q’ on the side of the camera.
There are two modes – Normal and HFR (High Frame Rate).
- Normal mode – to enable the high frame rate recording using the S&Q feature I pushed the S&Q button on the side of the camera, which turns the setting on. The camera sets itself to 50P mode by default. In this mode it is possible to shoot anywhere between 1 and 50 frames per second.
- HFR mode – to shoot with a higher frame rate, you need to go into camera’s menu under S&Q setting and change the setting from ‘Off’ to ‘Full Scan’. Once the HFR mode has been selected, you can then select a frame rate between 75 and 150fps.
The following applies when shooting in S&Q Motion mode:
- S&Q Motion cannot be set during recording or playback.
- Audio recording is not supported in S&Q Motion mode.
- Auto focus is disabled in S&Q Motion mode.
- When shooting at frame rates higher than 50fps the focus indicator, depth of field indicator, focus position indicator, iris position indicator and zoom position indicator are all turned off.
For the purposes of my project film on ‘expanding time’ I will:
- Shoot in High Definition in HFR mode.
- Use a frame rate of between 75 and 150fps.
Sony PXW-FS7 Software Version 4.0 Operating Instructions (2014) Sony Corporation