Hike on 3-5-18 using a Pentax K1 camera and a Pentax FA 43mm lens. Experimented with lens wide open. Discovered that setting not suitable for this sort of environment.
Hike on 3-7-18 using Pentax K1 camera and Pentax FA 24-90mm lens.
Hike on 3-17-18 using Pentax K-1 camera and Pentax FA* 24 and DFA 50mm lenses. After several days of rain we managed this short hike.