Unfortunately I have to leave this. Please, please CHECK your items before shipping. I am extrodinarily disappointed. I ordered a used 24mm 2.8/f lens for a gig. Shipping was swift, but upon inspection I was given a 40mm 2.8/f lens with the tag reading "24mm". I am not able to work with this lens as the depth of field is not correct for my subject matter. I called promptly to explain my issue, and was told the 24mm I ordered was never actually available and this was a mistake. All I was offered was a refund after the item is shipped back and received, and that human error is to blame - "I'm sorry" however doesn't resolve me being unable to work. I am hopeful to use the refund to buy a used lens from Canon directly. I wish I could leave a better review but this is an extremely frustrating oversight that prevents me from working the gig as planned.