Doug, Correct me if I'm wrong. The early 3part tube has no "Null" lug on the rear flange for 3, or 3rd cam use to null the meter for stop-down metering. The later ones do have a lug inside of the rear flange. I've done the 3rd cam conversion on an early set that I had, by taking a meter lug off of a aftermarket Olympus T-mount (it unscrews easily), and properly locate the needed position on the rear flange. Once this is done, drill a new hole inside of the rear tube section and screw the Olympus lug in place and bend as needed to properly orient the lug. Worked for me. Art Tafil ------ Unsubscribe or change to/from Digest Mode at: http://www3.telus.net/~telyt/lrflex.htm Archives are at: www.freelists.org/archives/leicareflex/