Quote Originally Posted by Tony Printezis
Sean, have you bought anything else from Maxsaver? I just had a look at their site and they seem to have a tripod ring for the 70-200 f4 for under $13 (the Canon one costs $130 or so). Is it worth giving it a shot? The investment is quite small.

Actually, I have not purchased anything else from Maxsaver. However, a few members of this community have purchased filters from the site and have been happy. They seem to deliver what they promise. As you noted, even if it doesn't live up to your standards, you wouldn't be losing much. However, if it works,you'll savea bundle. If it were me, I'd give it a shot.