Apropos of this discussion, I recall seeing interesting pictures of focal-plane shutter distortion of aëroplane propellers. If anyone has a link, please post it. I saw it several years ago but lost the link. I'm sure most here are familiar with that. Jeff Gluck ------ Unsubscribe or change to/from Digest Mode at: http://www.lrflex.furnfeather.net/ Archives are at: //www.freelists.org/archives/leicareflex/