Hello, fellow shutterbugs. I recently acquired some aging rangefinder cameras, and one thing they have in common is that while the rangefinders may or may not work, and may require some adjustment, is there any way to brighten up the image(s)? Can I do it, or should I send the whole job to a repairman? I'm talking about two horsemen 6 X9s, a Graflex Century Graphic, and a Kodak Medalist. The Medalist's rangefinder actually works, and requires some adjustment, but when I first looked through it, I barely noticed the split image section. Can the brightness be improved?