Good afternoon photo.net comunity. I am the proud owner of a new Canon 70-200 L2.8 lens. Just bought her at Ritz. However they did not have the instruction manual and gave me a 10% discount, which works for me. That's about $140, which got me the UV filter and left me with a bit of chainge. Any way, on this lens is, next to the AF/MF switch, is another switch that selects between 1.5m to infinity and 3m to infinity. Obvisualy this has something to do with the autofocus but can someone tell me what it does? I asume if you your subject is in between 1.5 and 3 meter you select the 1.5m, and if your subject is 3 meter away from you you go for the 3m. Just wandering what it does and I have not yet found it on the search area on this forum. Thanks in advance. BTW I do mostly portraits, in studio and on location, including low light.