I just impulse bought a Baby Speed Graphic. Nice little camera but I want to use it like a 6x9 range finder. The range finder at one time had a focus-spot attachment on it, now it doesn't. Should I cover that opening with something and does that explain the almost total lack of contrast between the two images?
Bunch of the Kalart's I've seen without the FocusSpot has a metal tab to block that hole attached via the screwhole while is open on your picture.
But a cheap report cover "gel" from any office supply store, or even the office section at Wal-greens and cut a piece to tape over the lower beamsplitter window. Will improve contrast a tad unless the beam splitter is totally shot.