This photo was taken at my friends balcony, 21st fl. Wasn't too windy. I clamped my gear to the handrail which was a 1/4" x 1" steel plate. Held up very well...
1Ds MK II
16-35mm f/2.8 II
f/11
30 sec
ISO 100
Mirror Lockup
Second image was taken at ground level. I had no handrail to mount the Super Clamp. I did find a vertical steel bar with the same dimensions as the handrail on my friends balcony. Clamped my gear on that and took this photo. Wasn't as steady as the handrail. Not sure if it was the steel bar or I didn't tighten the Super Clamp enough. Not bad though...
1Ds MK II
28-70mm f/2.8
f/8
10 sec
ISO 100
Mirror Lockup