gerald_fishel

<p>It appears that you are correct. I don't know why I thought it worked differently before. I guess it was in different ambient lighting conditions. Setting the "Flash sync speed in Av mode" to 1/250-1/60th works great.<br>

The problem I am having in shutter priority mode is that, for instance, if I set the shutter speed to 1/60th, the aperture setting will blink 4.0 which is the lowest setting, which I believe means that it wants to go lower. But I will still get a good exposure.<br /><br />I guess I just misunderstood what the camera is expected to do with the exposure when using the flash.<br>

Thanks for the insight.</p>

<p>I forgot to mention, that was in aperture priority mode. I have the same exposure problem in shutter priority mode as well. In full auto mode it gives better results with a shutter speed of 1/60th.</p>

<p>So I have a Canon 7D and I am suddenly having an exposure problem in the auto modes.</p>

<p>Right now I am using the Canon EF 24-105mm L IS USM. I'm in a room with medium lighting and focusing on a can of pepsi about 18 inches away at 4.0 with an ISO of 100, and the built-in flash activated. When I depress the shutter button, it sets my shutter speed to 1 second! The exposure seems to be basically correct, but I don't understand why it's setting such a long shutter speed.<br>

If I switch to manual mode, I can get the same exposure at 1/250th.<br>

The built-in flash settings are set to E-TTL II and the exposure compensation is set to 0.</p>

<p>It was working fine a couple of days ago, not sure what could have happened. Does anybody have any ideas?</p>

<p>Thanks</p>