Archived posting to the Leica Users Group, 1998/06/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]According to the experts, variable focal length lenses (as opposed to zooms) do not hold focus between focal lengths. I believe I've seen this stated specifically in Leica literature. Jim At 01:36 PM 6/3/98 +0000, you wrote: >George Huczek wrote: >> >> Does anyone know if this lens has to be refocused when focal lengths are >> changed? > >The answer MUST be no, because of the nature of rangefinder >focusing. It is not related to focal length. Right? > >> In some zooms, the lens stays in focus when the focal length >> changes. You focus at the longest focal length, then zoom out to whatever >> focal length you want to use. The Tri-Elmar is not a zoom lens, so I'm >> wondering if focusing drifts when the lens is set to a new focal length. >