Digital BW, The Print

Here's a free viewfinder for folks you don't have the Linhof 45
Multifocus Viewfinder.

Download the file at http://www.galerie-photo.com/cadreur.jpg

Print it at 300PPI. Carefully paste the print on a strong paperboard.
 Hollow out the gray zones with a sharp knife. Insert the ruler in one
of the two slits. Numbers on this ruler refer to focal distance.

Aim your subject while placing the ruler right under the eye. Delimit
the subject by advancing or moving back the viewfinder on the ruler.
Read the focal distance on the ruler.

Cheers,
André Moreau