I'll have to check my finder again when I'm back home in a few days, but from what I remember, it mounts rigidly with no movable parts. I just looked at the two 25mm finders listed on KevinCameras, and sure enough, one of them has the manual parallax correction dial (
link here). The other one
listed here is the type I have, which, although missing the dial, does not have the movable pin (such as
seen here in a 35mm finder). Looking at the images of the second 25, the movable pin and the hinge in the finder base are both missing. I was actually somewhat disappointed when I got my 25mm that it didn't have this feature, as I like this feature of my other canon black finders. It would be interesting to see if there was a version of the square 25mm finder with this pin. There was, apparently, a completely different type of 25mm finder which _did_ have the auto-parallax correction pin.
This pacificrimcamera.com page has some pictures of it if you scroll down to the bottom. This was another whole series of "erect image viewfinders" from 25mm to 135mm which, in appearance, are single focal length versions of the zoomfinders (i.e. from the rear, they look just like the zoomfinder. While they aren't brightline finders, they do have adjustable diopter correction built in. They're also apparently quite rare -- the only erect image finder I've ever run across personally is one of these in the 85mm focal length.
Scott
