bob_carpenter1 Posted October 3, 2004 Share Posted October 3, 2004 So I spent the money on this lens and tried it out all week. I did aweddding this weekend and had trouble auto focusing. It was very slowand sometimes did not auto focus at all. Anyone else have problems with this lens or might it just be a defectin the lens. The church was fairly bright and I was shooting from boththe balcony in the back and from about 20 feet back. I love some ofthe shots I took but many were from manual focus. Link to comment Share on other sites More sharing options...
bob_carpenter1 Posted October 3, 2004 Author Share Posted October 3, 2004 I just wanted to add I used a canon 10d without a flash for this shoot. Link to comment Share on other sites More sharing options...
beauh44 Posted October 3, 2004 Share Posted October 3, 2004 Hi Bob, I own one of these and its autofocus is excellent. The first 3 shots on this link were taken with a 10D and the 70-200 f/2.8L IS: http://www.photo.net/bboard/nw-fetch-msg?msg_id=009fmr If you have other autofocus lenses that do better, than I would think something might be wrong with the lens. Good luck! Link to comment Share on other sites More sharing options...
Rob_L1664876404 Posted October 4, 2004 Share Posted October 4, 2004 Bob, The Canon EOS forum is probably a better place to post this question. I have a new 70-200mm f/2.8L IS that was just returned to me from Canon Factory Service - a bearing went bad in one of the IS gyro's and started making noises like a bad water pump. However, at all times this lens has been a wonderfully fast and accurately focusing lens for me. Sounds like you might have a "bad sample." Link to comment Share on other sites More sharing options...
eric_chiu2 Posted October 4, 2004 Share Posted October 4, 2004 I am also 70-200L IS user. used a 70-200 non-IS for almost 5 years and switch to IS only less than a year ago. Use with a 1D. never have problem focusing. Just some time forgot that switched the focus option to 2.5m-infinity and it doesn't focus when i am too close to the object. but of course its not the problem of the lens. you could double check that. Basically, the focusing of all the USM lens especially L lens is super fast or should I say extreme fast. If any how you feel the focus is somehow slow or any sound come out from it, you should take it to a dealer and look at it. just a suggestion to check out your lens if it really have a problem. Go to a Canon dealer close to you with your 10D. Ask them the same lens for a try, than you will know, right? eric Link to comment Share on other sites More sharing options...
andrew robertson Posted October 4, 2004 Share Posted October 4, 2004 You spent the money on the lens, and it's having problems. If you got it from a retailer, return it. If you got it on eBay, you're probably out of luck. Also, you must realize that AF sensors work on the principle of finding contrast. If you were all the way zoomed in on the groom's black suit, and had the AF sensor over just blackness, than ANY AF camera / lens combination will fail you. You can speed up the AF operation by engaging the AF limiter switch on the lens. Link to comment Share on other sites More sharing options...
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