Re: Pedantry
Detail seems to be thin on the ground but the original DiMagex periscope zoom squeezes a longer movement length for its optical components than the depth of the camera body by reflecting 90deg and mounting the components vertically. My Dimage20 is still going strong, only the internal backup battery has failed, still zooms nicely after many years.
The P30 looks like it does the same, making it a real optical zoom. It's been suggested it's happened now because the KM patents have expired.