Archived posting to the Leica Users Group, 2002/02/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 8:38 PM -0800 2/14/02, Frank Filippone wrote: >I need a quickie lesson in Visoflex lenses.... Specifically, is there a >preset diaphragm? Is the lens open to full aperture for focusing, then you >turn some type of ring, to select your taking aperture? > >Is there any difference between lenses in their operation? Any lenses NOT >preset? Most lenses designed for use principally on the Visoflex II and III were provided with preset diaphragms. The 6.8 Telyts were some of the few exceptions. One lens, the 90/2 Summicron was even supplied with or without a preset diaphragm, depending on whether you intended to use it mainly on the Visoflex or directly on the camera with rangefinder coupling. Earlier lenses such as the 200/4.5 had neither preset diaphragms nor non-rotating focussing movements, so the diaphragm ring rotated as you focussed, and if the diaphragm ring was a bit stiff, you couldn't maintain focus as you stopped down after focussing. Not handy. - -- * Henning J. Wulff /|\ Wulff Photography & Design /###\ mailto:henningw@archiphoto.com |[ ]| http://www.archiphoto.com - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html