Experience with Ross Telecentrics?

I finally got around to making a lens board for a Ross 6.8/13 inch Telecentric I've had sitting on a shelf for the past year. The barrel shows plenty of use, but the glass is very nice without scratches, and the aperture ring works just fine (goes down to f32). I did a quick search of forum post titles and didn't see any posts about this line of lenses, so thought I'd ask if anyone has experience with any of them. Camera-Wiki has a good description of them here: http://camera-wiki.org/wiki/Telecentric

My recent mounting of the lens:

Attachment 188943