Archived posting to the Leica Users Group, 2001/01/16
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]on 16/1/01 8:20 pm, Rob Studdert at audiob@ozemail.com.au wrote: > Hi, > > In the process of measuring the lens length from the mounting flange of my > M lenses in order to design a case I noticed some interesting variations in > measurements vs printed specifications (users manuals and advertising > matter seemed to correlate). > > In particular the: > > Summicron-M 50f2 (11826) measured 46mm spec 43.5mm > Summilux-M 75f1.4 (11810) measured 82.5mm spec 80.0mm > Summicron-M ASPH 90f2 (11884) measured 83.5mm spec 78mm presumably you measured them focused at their minimum distance? otherwise you are not getting them at their longest. - -- Johnny Deadman http://www.pinkheadedbug.com