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pgosu
27th of July 2003 (Sun), 15:48
The car dealer I work for in my real job was the headline sponsor for an Arenacross event yesterday evening...with freebie tickets, it'd be a good chance to test out the 10d with my new (used) 70-200 f2.8 L lens.

It kicked off at about 7:30 (so, in other words, plenty of light). To my horror, I couldn't get AF to lock on ANYTHING. I mean not even a stationary hay bale 100 feet away. It just searched and searched much like it would with a 2x converter and too little light.

Speaking of, this same camera and lens has had very good AF results with a Canon 2x (not the II version).

I tried different settings (Program, sports mode, fully auto), all with the same results. Tried turning the 10d off, tried the "clear settings" menu option. Took the lens off and re-seated it. Alas, nothing worked. The L was the only lens I took, so I don't know if it was exclusive to that lens or not.

Shot everything in MF mode and was pretty happy with the results (see sample pic below), but know I missed some good shots due to no AF. No biggie because I was just shooting for fun. Now when college football gets here, it'll be business...and intermittently having no AF at all isn't gonna work. Anyone have any ideas?

This A.M., went out and shot some landscape shots and AF was fine with both the L and a 28-70 USM, in every mode I tried (P, Landscape and sports, just to be sure).

http://www.rivals.com/uploads/932/100906.jpg

J.A.F. Doorhof
27th of July 2003 (Sun), 15:54
Hi,

I know AF needs high contrast to focus, maybe that was the problem ?

Greetings,
Frank

Belmondo
27th of July 2003 (Sun), 19:43
Did you try they 70-200 this morning to see if it was working again?

pgosu
27th of July 2003 (Sun), 19:51
Sorry, guess I wasn't clear enough.

I tried the 70-200 L and a 28-70 USM this morning, and both worked fine in AF.

oops
27th of July 2003 (Sun), 20:20
I would have removed the battery for a couple of clicks to give the cam an electronic kick in the butt. This works wonders with cf card errors.

Chris.

pgosu
27th of July 2003 (Sun), 20:25
Chris,

Didn't think to try that, but think it just might have worked. Thanks!