Actually, for the biggest ones, I had to use my 
digital camera.  That was tricky, as getting the 
images square in the viewer was next to 
impossible (and all the images are a little gee-
hawed as you can see).  And reflections/glare off 
the front were also a problem.  But happily the 
quality of the images was OK in the end, and it 
saved a lot of time in multiple scanning passes 
and cutting and pasting.