Someone reccomended the Zig Alignment system, which was designed for photo copy work. Its sole purpose is to align the 3 planes making them perfectly parallel, i.e. film plane, lens plane and copy material plane. Although it can be used to make any planes parallel for any application, it was designed with copy work in mind. The system is very unique in its means to align the 3 planes. Here is a link, you may have to fish around the web site a bit to grasp the concept...
http://www.zig-align.com/basics.html
Anyone use this system? Comments?
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