Homebrew PCBs

Hi,

    As  a fun project I thought I would build a Large Format Camera 
to use for 2:1 reductions of artwork for PCB's. I bought a book From 
Lindsay " Simple Large Format Camera Construction" by Edward A. 
Hover.  It looks like a straight forward project and not very 
dificult. My problem is that I know nothing about what type of lens ( 
other than it needs to be a large format type) to use. I did a search 
on eBay and there seem to be a number of different types that could 
be purchased for a reasonable amount if they would work. I would sure 
appreciate it if someone could point me in the right direction. The 
camera will be dedicated to doing 2:1 reductions only and in a fixed 
location which, I assume make it a simpler problem. Also, do I need 
to use a special film?

    Thanks - Jack