I have one. Mine is a new one with the adjustable dividers, so measurements are really irrelevant. The body of the insert fills the entire F2. You then have a divider that will make a 1/3 width section that holds two lenses. At that point you can leave the other 2/3 section open, or arrange the two flat dividers as you like. Very versatile.
Here's what it looks like in my F1x with all the included dividers used
Here it is in my F2 with only the lens pockets used. The big 2/3 space left open
In the big compartment is a Canon 1D3 and 135 f/2. The 24-70 f/2.8 will fit attached just as well. Also note that my F2 is an older one that is dimensionally a bit smaller than newer F2s. I had a new F2 and the digital insert fit much looser. It is just a bit tight in my old F2, but still very nice.
Last edited by Lacks_focus; 04-16-2011 at 08:30 AM..