David & all, I found out that you can nearly get 1:1 by using the Elpro3, or Elpro VIIa, with series 7-to-55 adapter ring. For qiuck field use, or when traveling light, I usually use this combo. Also, for those of our group that have the earlier 60 macro and 3 cam tube, the extension tube also works perfectly on the 100, f/4 lens. I also use this combo. I've never gotten around to acquiring the proper tube for my 100, since I found out that the 14198 works just as well. Just a thought, Art Tafil natstek@xxxxxxx ------ Unsubscribe or change to/from Digest Mode at: http://www3.telus.net/~telyt/lrflex.htm Archives are at: www.freelists.org/archives/leicareflex/