I am likely going to sell my absolutely pristine Canon 300 F4L lens. If you are interested, as an MBN member, I will give you one HECK of a deal. Am planning to send it to Canon for a Clean and Check prior to selling.... I am moving to a 400, (and have a 70-300 as back-up), so, at this point, do not see a need for the 300. I am extremely anal about my gear.... it never goes out in the "elements" (i.e., temps under 30 or heavy rain/snow.) PM or email me if you might want/need this great lens!