New full-format sensor, again from Sony, 3 different sensors are installed in the prototypes, for the series I’m guessing the 61M BSI CMOS million pixel sensor
Very fast fps
4K (and higher) video
USB C 3.2 connection
Joystick
Touchscreen (thankfully can be switched off)
New smart functions (including those that the K3 III doesn’t have yet)
Bluetooth / WiFi
New control software for the cell phone (with live view)
GPS built-in
Astrotracer built-in
Key illumination
Very solid workmanship, very good feel
Of course, the optical viewfinder (but significant improvements in the information display)
Production is scheduled to start in Vietnam in October
LCD display with a slightly higher resolution than the K1 III
The battery remains the same as in the K1 II, 645Z and other Pentax