As you probably know at this blog we occaisionally use old folding cameras like the Zeiss Ikon and Ensign Selfix.
The biggest problem with these cameras is that some of them just have albada viewfinders, that is there is no focusing aid such as a rangefinder.
I'd like to share with you a great tool that allows you to make a custom RF just by placing some details into field on a webpage.
This generates a PDF which you can print, cut out and store in your camera case(I laminated mine too).
Here is the link.
Here is how mine looks for my Ensign
It works by holding the card at arms length and opening your left eye and lining up a vertical with the '0' line, close the left and look though your right, note the number that the vertical line now passes through–that's your distance.
I'd like to thank Thomas Achtemichuk for this great tool!