On Tue, 10 Jan 2006 07:31:02 +0100, Joerg Thomas Klein <[EMAIL PROTECTED]> wrote/replied to:
>I used a tripod and was shooting a traffic sign in white and blue. On a >second try I shot some tree branches against the sky. In both times the >image in the viewfinder is sharp but the af is hunting like he could not >find the right tooth of a gear wheel. >My problem is that I would like to buy this lens as an replacement for a >old Sigma 2,8/70-210 APO which does not have this problem, but is not >usable on a the 350D. >If I need to pay some money to repair the Canon 2,8/70-200 the I would >give the lens back and look for another one. Servo focus can hunt if your focus point is on something with a solid tone. You should be able to get a lock on the edge of a traffic sign, but maybe not on the solid tone part. With tree branches, that's a tough subject. Remember that servo focus is for moving subjects, on static subjects you should use one shot focus. Servo focus on some subjects will cause an audible soft clicking sound, the focus is 'live' all the time. It's really hard to say if what you experience is normal or not. I would test by trying to follow a moving subject, since that's what servo focus is for. -- Jim Davis, Owner, Eastern Beaver Company: http://easternbeaver.com/ Motorcycle Relay Kits, Powerlet, Posi-Lock, Parts, Info, Photos K100RSes on both sides of the planet! * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
