>>3397697Their cameras use a lot of novel technology, but they skip of marketing it properly.
Weather sealing.
SR (shake reduction) - image stabilization in the camera body, giving you this feature even in the cheap adapted $30 manual lenses.
Pixel Shift starting with K-3 II (2015).
From the minuses, the choice of new lenses is limited, and the weather sealed ones are only Pentax brand lenses.
The number of lenses overall is huge however, if you include older and manual lenses. For K mount there are 142 primes and 105 zooms. Get a PK/M42 adapter and you get access to 103 primes (and 4 zooms). This doesn't include 3rd party lenses. And they are all viable choice, thanks to in-body stabilization.
Good pick if you know what you are doing and have some special needs. A worthy consideration if you are not a professional.