We still don’t know for sure what Panasonic will announce in exactly on October 27th. I believe it’s very likely they will give us more details about the GH6 on that day but so far we got no leaks. Probably because the camera isn’t ready for a full announcement yet. There will likely be only a smaller updated info on the GH6 development. The GH6 is rumored to have a new hybrid focus system and shipment is expected to start the first half of 2022.
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For the record: On October 27, 2011 Panasonic announced the “Lumix L1″(here on eBay). it was (and is still) a very good looking camera!