Re: [Leica] M tele-converter

[Dave Richards <dprichards@uswest.net>]

This becomes problematic, since the lens informs the body which frame lines
to throw up based upon the lens' focal length.  A teleconverter would
necessarily be universal, that is, usable by various focal length lenses
and, thus, unable to communicate focal length info to the body.  Plus,
since the M uses rangefinder, not reflex viewing, a tele-converter used
with long lenses, which is the only application where a teleconverter has
any real value, would result in a framing area so small as to be even less
approximate, and therefore less valuable, than it is already.

>Thinking about the Tri-Elmar, which conveniently offers three focal-lengths
>in one handy lens, I thought of another accessory Leica could build which
>would be very convenient:
>
>    A 1.5X tele-converter
>
>By carrying three lenses (24mm, 50mm, and 90mm) and a 1.5X converter,
>you could cover a complete range:
>
>    24mm X 1.5 ~= 35mm
>    50mm X 1.5  = 75mm
>    90mm X 1.5  = 135mm
>
>As far as I know, Leica has never produced an M tele-converter.
>
>Mike
>
>--
>Michael Chmilar
>chmilar@acm.org
>
>
>
>