The IS switches are usually below the AF/MF switch (see the primes), and the zoom lock is usually on the other side like in this picture (also compare e.g. the 70-300 IS).
The new one looks a bit like the 16-35L:
(or it might just be the shade of black in the picture)
« Last Edit: February 06, 2012, 08:20:40 AM by ferdi »
1D IV, 5D II, 16-35L II, 24-70L II, 24-105L, 70-200L IS II, 300L IS, Σ 50, Σ 85, 1.4x III, 580EX II, 600EX-RT