All images I see depict the DR-6 in either the standard "look-down" position or sideways. Will it also work upside down? My tripod fully extended can place the camera viewfinder (eye cup) at 78". I'm only 6' so clearly I'll need a stepladder or such to look through the viewfinder. I'd like to use the DR-6 to view the object without having to use something to stand on. Thanks.