In a message dated 12/22/02 12:53:16 PM, [EMAIL PROTECTED] writes: << I think the tripod collar helps to balance and center the mass of
camera+lens over the center of support. I would not use any lens over 200mm if it doesn't have a tripod collar (and anything faster than 200/4) simply because I don't want to put torsional force on the lens mount. I can understand that many people would consider the 300/4 M to be very compact for it's focal length but because it doesn't have a collar I would only use it hand-held which limits its practicality and usability. When I was in the market for a 300/4 the deciding factor in choosing the Sigma 300/4 APO Macro over the SMC-M 300/4 was the tripod collar. (The FA lens was WAY out of my price range). Christian Skofteland [EMAIL PROTECTED] >> I can understand your reasoning but I don't really agree. I use my 300F4A* lens with tripod all the time. No problem... Vic
