If you don't want the trap focus feature enabled when shooting MF lenses, just flip the AF/MF switch to MF. The trap focus feature is always disabled in that manner.
Shel > [Original Message] > From: Cory Papenfuss > I realized that when I upgraded my -DS to 2.0 firmware. I was > generally rather annoyed at the trap focus "feature" preventing the > shutter from tripping when I was shooting manual lenses. I've never > actually tried to use it, but I'm glad it can be enabled/disabled now. > Maybe if I'm doing some action shots I may see if it works.
