Just last month I went to visit Panasonic UK for a hands-on with the new Panasonic GH5S. My full review is in the pipeline but first an introduction to the new camera on the block...
The GH5S has a newly developed 10.2MP sensor for enhanced low light performance, as well as 240fps 1080p S&Q. Furthermore for the first time since the GH2 this sensor is an over-sized 1.86x crop multi-aspect sensor.
Possible for the first time is 60p at Cinema 4K resolution (4096 x 2160), whereas the G
Question, where are you getting 1.15x crop? 2 x 0.64 = 1.28, or about aps-h. The image circle in DCI doesn't change the crop factor, its still 2, same for 4/3 or 3/2, the diagonal is alway the same - the diameter of the circle. The m43 diagonal in all aspect ratios is 21.63mm, that never changes, right? You can see from the image below, all the aspect ratios are still within the m43 image circle, so they all have the same diagonal. Unless I'm looking at this wrong, but people seem to be calculat