The manual is now out for the Samsung NX500. This was the compact and relatively cheap camera with NX1 innards (same sensor and processor) that would shoot 4K on an APS-C sensor.
But,
1. The 4K is done by cropping the sensor. The NX1 samples the whole sensor. This means on the NX500 the crop mode is more than 2X35mm, as opposed to 1.5 on the NX1. Impossible to get wide angles with any OIS lenses, including the kit zoom. It is also unclear how good cropped mode is relative to full sampling.
2. The maximum bitrate for 4K is 40 Mbps (HEVC). That for the NX1 is 80 Mbps (HEVC).
3. There is no focus peaking in 4K mode!
And, of course, no evf or mic input, but we knew that.
But,
1. The 4K is done by cropping the sensor. The NX1 samples the whole sensor. This means on the NX500 the crop mode is more than 2X35mm, as opposed to 1.5 on the NX1. Impossible to get wide angles with any OIS lenses, including the kit zoom. It is also unclear how good cropped mode is relative to full sampling.
2. The maximum bitrate for 4K is 40 Mbps (HEVC). That for the NX1 is 80 Mbps (HEVC).
3. There is no focus peaking in 4K mode!
And, of course, no evf or mic input, but we knew that.