10x optical zoom for 4/3 Olympus (28-280)

Started Jun 3, 2003 | Discussions thread
digital_ray_of_light Veteran Member • Posts: 5,068
Rangerfnder? (another one)

Patent: 6,556,785, with a date of April 29, 2003

First sentence of Abstract:

In an apparatus comprising a zoom lens and an electric flash, a range finder that determines, on the basis of an output result obtained by means of one method out of an active AF and a passive AF, whether or not to operate the other method, is utilized.

brian wrote:

I don't read this group too often, so forgive me if this is common
knowledge. I just discovered a fairly recent Olympus patent the
other day for a 14-140 zoom for the new 4/3 format. Aperture is ~
f/3.5 - f/4.5, 35mm equivalent is approx. 28-280mm, and it appears
to be a legitimate "ED" design with fluor crowns located where they
might actually do some good. The patent number is U.S. 6,483,648.
J. Brian Caldwell

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