I love long exposure photography. Through the use of filters and experimentation, you can create some very beautiful images. I generally shoot at 20-30 seconds using a 10 stop neutral density filter. I adjust the aperture as I see fit. I came across this icy log on a recent hike. I loved the little stream running below and the way the light hit it was spectacular. You need a tripod and a remote shutter release to do this right. I also block my viewfinder to stop any light that may leak in during the exposure.
This image was shot at 20” @f/11 ISO 100