arbitrage
Well-known member
That is for sure atmospherics where air right above the water surface is warmed faster than the water. I actually think after seeing your examples it was more than likely atmospherics over the sand than the water but at that distance and shooting downhill it is a classic case of atmospherics.There were about 300 hundred photos where absolutely nothing was in focus. I'm very familiar with the camera and with what could cause something to appear soft. I live and shoot in South Texas where heat distortion and temperature differences are an everyday issue to work around. The second I took it off the water and shot a plant, or a leaf, or a cactus, there were no issues. It's when I shot something in the water that I came into some issues that I've never experienced with this camera before
This is totally different than what the OP was discussing back in Feb. He was seeing AF lost on rippled/contrasty water which is always a problem. In your example the water seems smooth enough that I wouldn't expect general AF issues to be the reason.