I received this lens in a trade but I have the 24-105L and I prefer the IS and F4 to the F2.8 of the sigma. Image quality is excellent, very useable at f2.8, and very sharp by f4. Great fast zoom for lowlight situations.
The lens is in excellent condition, no marks on front or rear elements, nothing on the budy. Small rub mark on the bottom of the hood where it is set down (as can be seen in the 3rd pic) Comes with everything, both caps, hood, case, box, instructions and blank warranty card. I'm asking $430 cash pick up in Calgary, or I will ship it expresspost for $450. Lens sells for $640+ tax new at the Camera store
Trades also entertained. Looking for a 50 f1.4 or a sigma 30 f1.4