Another demonstration of the use of shutter speed when representing movement.
In a darkish room, I played a vinyl record (Bowie At The Beeb… disk 2, if you’re interested) and placed a small finger puppet on the centre of the LP. I then focused on this puppet with the camera set (initially) to shutter priority mode. I tried different shutter speeds.
After this I set to fully manual mode and played around a bit.
Even at f2.8 with ISO 3200, at 1/20th of a second this is underexposed. It was the slowest setting I could actually make the finger puppet visible. For a faster shutter speed, you’d need a flash.
Slowing things down to 1/8th of a second. Motion blur is very evident, while things are a bit brighter. Still requires ISO 3200 which results in an unpleasantly noisy image.
1/4 second. Brighter, very blurred, and still needing high ISO.
“Please….. make it stop!”
At 30 seconds, the tone arm is also showing motion blur.
“Oh my God, I’m gonna be sick!”
At this point I switched to manual mode and stopped down to f11 and set ISO 100. I then began flicking a torch across the finger puppet, to try and capture sharp(ish) ‘ghosts’ as it went round. I failed.
Now I tried just flicking the torch across the finger puppet while it was in just one part of the rotation.
“Dammit… I’m calling my union. I didn’t sign up for this!”
For this shot, I just swiped the light from the torch across the record once, as quickly as I could, trying to time it so that the finger puppet was facing the camera.