Archived posting to the Leica Users Group, 1998/04/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]> >It occurred to me that there could be a relatively simle way of testing some >of these erratic quality lenses and avoiding duds like Tom A's 20mm Russar >problem. >Take along a (Leica) screw mount focussing screen, these were made by a >variety of manufacturers, and a magnifying device, a 8-10x lupe would do. >Then you can check for correct image and focussing on the groundglass at >both infinity and close focusing distance. >Jem What is this thing, and where can I buy one?? thanks Steve