P3D Re: StereAll Viewer

["Ray Moxom" <raymoxom@xxxxxxxxxx>]

In P3D Digest 3717, Norm Lehfeldt wrote (extract):
> Another thing that surprised me is that the viewer pretty much covers
> seven-perf film landscape. There is a little vignetting that the spoils
> the window in critically mounted slides, but it's clear that the German
> manufacurer intended it to be acceptable for seven-perf viewing.

Norm, the aperture can be filed out to give a bit more clearance for
seven-perf viewing. The StereAll viewer is common in Australia as they were
imported by the importer of other stereo camera brands. The ones that I see
are for oversized mounts (105 mm wide I think) and need to have a small
strip of plastic glued to each side of the slide slot to ensure that the
slides are held central. I agree that the lenses are reasonable. The most
common problem with well used StereAll viewers is that the focusing
mechanism gets a bit sloppy and tends to skew.

Ray Moxom