Shutter mode Selection
This is a relatively new option that’s included on the KP as standard but which was also made available to K-1 users via a firmware update. it lets you decide whether to use the camera’s manual or electronic shutter, an option that’s fast becoming standard on compact system cameras.
Normally, the camera will use a mechanical shutter to take the image, but there are downsides to this. The main one is that it’s noisier than using an electronic shutter, which can be an issue when you need to be discreet. it can also cause vibrations that compromise image sharpness.
Using an electronic shutter on a compact system camera gets around both of these issues but on a DSLR you still have the issue of the mirror swinging up and down, which means there is less of an advantage.
For this reason, this feature is only really intended for live view shooting. however, another key advantage of using this, namely much faster shutter speeds, does seem to be available when using the viewfinder.
Whereas the KP can only fire at up to 1/6,000sec with its mechanical shutter, this increases to 1/24,000sec when using its electronic one. This is likely to be useful for those wanting to use the camera for very fast-moving subjects or when using wide-aperture lenses in bright sunlight, where the camera’s mechanical shutter may not allow for sufficient fast shutter speeds.