Photographer Josh Cripps of Professional Photography Tips made this short and sweet introductory tutorial on how you can use 10-stop neutral density filters to capture long exposure photos in bright daylight. These filters drastically reduce the amount of light hitting your lens, allowing you to blur slow-moving things in your scene (e.g. clouds or streams).
“This is an extremely popular subject that many nature photographers are trying to understand better,” Cripps says. “In the tutorial I discuss how to calculate the proper exposure time, how to correct for color, and what best practices to use with a strong ND.”
Here are a few of his example photos that show how you can make daytime shots have the feel of nighttime photography: