This clip was shot with a 70-200lISf4 @ 70mm. The goal was to illustrate the advantages of the IS system when doing video.

The last segment of the clip shows how steady the image can be when a Smoothcam filter is applied on top of the IS.

Full article on: canon5dtips.com

IS as always helped me when taking picture, but now I am thinking about switching my 24-70L2.8 for the 24-105LIS4...

Note: video taken after I worked out, my hands are generally steadier than that. Since the two clips were taken 30 seconds apart, it just prove the point.