Archived posting to the Leica Users Group, 2006/06/15
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 8:45 AM -0700 6/15/06, Frank Filippone wrote:
>WA Retrofocus lenses have traditionally been inferior to true WA
>lenses because of some complexities in the design. With more
>computer use, more glass types available, and more experience, this
>may have been negated.
>
>The best performance in WA lenses has always been RF lenses.... the
>35/2.8 Biogon, 21 Biogon, etc. Nothing came close when they
>were introduced in the 60's and before. Today, few lenses come close
>to these designs.
>
>Certainly new designs will be required for Leica. They will be
>smaller ( smaller sensor = smaller glass), lighter, faster, and more
>overall compact.
This doesn't follow. Are the Olympus lenses for the 4/3 system
commensurately smaller than lenses for full frame? No. They are also
a lot larger than lenses for the PenF, which has a larger 'sensor'.
Lenses that are partially telecentric are intrinsically larger than
standard lenses; what is desired is that light rays strike the sensor
at 90 degrees. For that to occur you need a rear exit pupil that has
a diameter the same or larger than the sensor. Makes those lenses
huge.
>They will be designed to some degree ( or entirely for Digi-M ) with
>considerations for the digital sensor.
Leica has stated several times that the new lenses will be fully
useable for the existing film cameras.
>Retrofocus? Probably. Will they be as good as the 50 ASPH
>Summilux? 35 ASPH Summilux? 21, 24 ASPH Elmarit? 28 Summicron?
>
>Tough act to follow.....
>
>Will they be R lenses in new bodies and M mounts? Maybe.....
>
>Frank Filippone
>red735i@earthlink.net
>
>
>
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--
* Henning J. Wulff
/|\ Wulff Photography & Design
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