Guess we'll have to wait. My guess is that Adorama is wrong, and it's an optional accessory (and will likely be nearly $200, and not available at first, if the Tripod Ring D for the 100mm L Macro is any indicator).


In their Digital Learning Center writeup, Canon states, "An optional Tripod Mount C (WII) is available, and its operation likewise is both solid and smooth..."


On the other hand, on Canon USA's EF Lens Lineup page for the lens, Canon states, "Gleaming white, with a removable tripod collar, dust and water resistant construction, and a newly developed Fluorine coatingthat keeps soiling, smears and fingerprints to a minimum, its phenomenal performance and flexibility is assured." The Tripod Mount Ring C is listed on the Supplies and Accessories for the lens, but so are the pouch and hood, and those are included.


Given the length of the lens, and the fact that it's closer in weight to the 70-200mm f/4's with the optional ring than to the 70-200mm f/2.8's with the included ring, and also given the fact that if Canon can find a way to make more money, they will...I'll be surprised (very pleasantly, though) if they include it with the lens.