Ok, another couple of newbie questions. I have a Canon 60D with 18-200is lens. I am just getting used to the camera, but there are several things which confuse me.
1. When shooting in Av (or Tv) mode, can someone tell me why sometimes I can change the various settings (with the wheel or from the Quick control screen) and sometimes I can not. I have discovered that if I turn the Live View on and then off, I can again change the options. Of course, I can change the various options if I power down and up again. In the Quick mode, a few of the options will be bright (changeable) but most are grayed out (unchangeable).
2. Again in Av mode, I set the ISO and aperture each to specific values. I then focus on a very distinctive spot and take several pictures. It seems on each picture the shutter speed has changed, sometimes significantly enough to cause the resulting picture to be way too dark.
Any help will be greatly appreciated.
P.S. The battery is fully charged.