60d 60p interesting banding from strobes.

[renegadewill]

This is a promo for a new music video I am cutting, but look for the banding of the strobes.

http://www.youtube.com/watch?v=IbDvHomD3ss

60p, 1/125 shutter.

 

[Jarrett P. Morgan]

It is a nature of the camera and how they read the sensor. they read it lines from top to bottom, so when the strobe goes off, the flash is so short only some of the lines are being read while the flash is brighting up the scene.
does that make sense?