In this video you will get some insight on how to set your DSLR camera, whether using a Pentax K-70 as I do, or any DSLR or Mirrorless camera, to get stunning and beautiful long exposure waterfall images on your next outing. I also give my opinion on whether you should turn off image-stabilization on your lens or in-camera when using a tripod in a waterfall or river.
I purchased the Pentax K-70 primarily to have a waterproof/water resistant camera for situations like this where if the camera did take a spill into the drink, the 100-rubber seals would go a long way in keeping the camera operational without having to send it back to the factory for drying out, or worse, ruined completely. Nonetheless, WR is not the only benefit of this APS-C sensor camera. It's a tank, but it's also capable for producing excellent quality images, and performs better in high ASO than most cameras in it's price range, and above.
The sharpness of the camera's built-in stabilization, along with the WR 18-135mm Pentax DA lens make this a great bad weather combo, but also a great camera for any type of photography you'll need it for, from amateur to pro applications.