C100: Dark corners on Glidecam (C100, Canon 17-55/2.8)

[michasacuer]

Hi, few days ago i shooted film on glidecam. When i back home and look on it i saw dark corners. What is the issue? I tried to do it again but i cant repeat this I think its image stabilization (i had it turned ON) on my lens, Canon 17-55 f2.8. Or maybe its ND filter?

What is your opinion? How to defend themselves? What i should to do when i will work with glidecam again?

Footage below:
https://www.dropbox.com/s/w8w4a47upcmu5sx/czarny róg.mpg?dl=0 (download to better quality, button in right corner)

Thanks for help!

 

[Matt Turner]

You could try turning on the EF-S lens option, it will add a small digital zoom but might reduce any vignetting.

See: http://www.dvxuser.com/V6/showthread.php?298184-Please-Explain-the-EF-S-Setting

Read the 3rd comment.

BTW, your link doesn't go to dropbox, there's no way I'm downloading it.