johnastovall
Deceased, but remembered fondly here...
"I just hit on an easy way to breathe new life into a dim rangefinder. They used to make orange filters to dim the primary RF image in screwmount Leicas, and this did improve contrast - but it darkened the primary view in the process. It occurred to me that what you really want to do is just darken that part of the primary image that's competing with the dim secondary ... a little spot in the center. This you can do, easily and quickly, with a bit of black tape or even a fine point marker pen..."
Full how to ....
Full how to ....