This is 18 hours later, so first I will ask "Have you worked it out yet?" When the finder is open, in the centre of the top edge to the left of the opening 'knob' is what I would call a slightly recessed bit of metal, about the same dimensions as the opening 'knob'. Press down on that and the magnifier will pop up. To get the magnifier down again, just push on the magnifier itself. You are right, it is a very useful accessory, particularly for ground level shots or when you don't want to put the camera to your eye. It's amazing how most people, in these days of digital P&S's at arms length in front, don't realise that you could be taking a photo when you are looking down at the camera at waist level. The problem I have found with my DW-3 is the difficulty of getting good manual focus on such a small image with my deteriorating eyesight. Consequently I have been looking for a DW-30 for my F5 for quite a long time, and I finally snagged one on the 'bay last week. I haven't received it yet, but hopefully it should be a bit easier to focus with an AF lens.