Position Preset?!

When I set the position preset for "FOCUS" mode:

1) I hold the switch in the "set" position and focus onto object 1
2) Then I change my focus onto object 2
3) Then when I hold the switch in the "on" position, the focus changes to object 1.

Is this the only use of the preset focus feature? Do I have to constantly refocus to object 2?

When I fool around with the focus preset and then turn the Position Preset to the "off" mode the camera just randomly starts zooming..... Why is this?
 
Back
Top