Archived posting to the Leica Users Group, 1999/03/28

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: RE: Antw: [Leica] Autofocus & Leica
From: "Henning J. Wulff" <henningw@archiphoto.com>
Date: Sun, 28 Mar 1999 18:15:37 -0800

Alan Ball wrote:


>As a matter of fact, ALL autofocus bodies provide focus confirmation with
>compatible mount, manual, electronics free lenses (most Nikons and all
>Pentax show complete backward compatibility in that respect). AFAIK, you
>will also get focus confirmation with a Leica R or a M42 lens mounted on an
>EOS body. There is no need for electronics in lenses for focus assistance
>applications: the sensors are in the body and they telemeter points as they
>will appear on the film plane. Electronics come in handy for sophisticated
>TTL flash management, and, depending on the supplier's architecture,
>reliable, non-mechanical, interactive management of the iris.

Not quite true. My early Nikon F90X's don't. Nikon wants $100Cdn to allow
focus confirmation with non-AF lenses. There are probably others.

   *            Henning J. Wulff
  /|\      Wulff Photography & Design
 /###\   mailto:henningw@archiphoto.com
 |[ ]|     http://www.archiphoto.com