You see lots of cross-sectional diagrams in lens manuals, but it takes the real thing, bisected, to get how complex these things are.
http://blog.wired.com/gadgets/2008/06/gallery-of-cut.html The lens he mentions on the red background isn't actually a 30's lens. It's the amazing Tri-Elmar 28-35-50 from the late 90's. D -- [EMAIL PROTECTED] http://members.iinet.net.au/~derbyc -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
