[FONT=Geneva, Verdana, Arial, Helvetica, sans-serif]I just got a Canon EF 75-300mm 1:4-5.6 III USM lens for my Digital Rebel XT.
When in AF mode, the lens seems like it tries to focus (moves back and forth, makes noise, etc) but it never "locks" on a subject. Also, the red-dot indicators in the viewfinder never light up at all.
Is this lens defective or is there a setting I need to change on the camera (or lens)?
I tried both distant subjects and close subjects. I tried both outdoors in the sun and indoors with incandecent lighting.
The same happens whether it is in AI or One Shot mode.
The lens that came with the camera works perfectly.
Any help would be most appreciated! Thank you!
(P.S. I called Canon customer service, and all they told me I should try is to clean the contacts on the lens and camera body. I'm not home right now, so I can't try that... but somehow I don't think that is going to fix it.)[/FONT]
When in AF mode, the lens seems like it tries to focus (moves back and forth, makes noise, etc) but it never "locks" on a subject. Also, the red-dot indicators in the viewfinder never light up at all.
Is this lens defective or is there a setting I need to change on the camera (or lens)?
I tried both distant subjects and close subjects. I tried both outdoors in the sun and indoors with incandecent lighting.
The same happens whether it is in AI or One Shot mode.
The lens that came with the camera works perfectly.
Any help would be most appreciated! Thank you!
(P.S. I called Canon customer service, and all they told me I should try is to clean the contacts on the lens and camera body. I'm not home right now, so I can't try that... but somehow I don't think that is going to fix it.)[/FONT]