
From: http://egami.blog.so-net.ne.jp/2012-11-02 (Japanese)
The new patent is a 24-100mm 135 equivalent zoom lens on a 1/1.7" sensor.
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Comments by IntenseDebate
Kevin Purcell · 643 weeks ago
http://www.ricoh.com/r_dc/gx/gx200/specs.html
GX200 is 24-72mm eq f/2.4 to f/4.4 zoom (11 elements in 7 groups) with type 1/1.7" CCD 12Mpx sensor. Introduced in June, 2008. It was "GRD 2 with zoom"
I presume the presume the "GX300" is 24-100mm eq f/2 to f/3.5 zoom with type 1/1.7" BSI CMOS 12Mpx sensor (from Sony) with a stop more ISO range than the GRD 3/4.
Expect the GRD 4 "extra" AF to returnto the GX300 (it was on the GX100 and dropped on the GX200).
This will be a "GRD 4 with fast zoom" i.e. a very interesting camera.