Well said and thorough. I have gone as slow as 6 seconds. As you said the sun is our enemy when doing this.
Adirondack Hiker wrote:
A tripod is a MUST. The exposure should be between 1/2 and 2 seconds. Also, I typically use an f/stop of f/16, as well as a circular polarizer to further reduce light and reduce any glare. I set the ISO to 100-200. Avoid sun light, it is a killer. Dawn, dusk overcast and even rainy days are the best times to shoot. Finally practice, practice, practice. Good Luck.