This type of photography is either called Long Exposure or Slow Exposure, due to the fact that that the shutter is open for a Long amount of time, or the shutter speed is described as Slow. This type of photography is mainly used on shots with water, to make the water movement Smoother. Depending on the area being captured, the delay given to the shutter can vary from a few seconds to a few minutes. Because the shutter is open for so long, it is absolutely essential that a sturdy tripod is used, to avoid any blurring of the final image. As can be seen in the pictures below, a favourite method is to capture parts of the image which aren't moving, therefore enhancing the smoother moving parts.
Olympus OM-D E-M5 Mk iii ~ f11 ~ 4 secs ~ ISO64 ~ 14mm
OM-D E-M5 mk iii ~ f18 ~ 1/2 sec ~ ISO 64 ~ 12mm
OM-D E-M5 mk iii ~ f20 ~ 1/2 sec ~ ISO 64 ~ 18mm
OM-D E-M5 mk iii ~ f8 ~ 1/8 sec ~ ISO 64 ~ 31mm ~ -1.7Exp
Smoothing The Water. As I explained in a previous image, adding non-moving aspects to the image, enhances the smoothing effect of the water, which can be seen by the rocks, leaves and greens surrounding the babbling of the water.Olympuys PEN E-PL5 ~ f11 ~ 1/15th sec ~ ISO 200 ~ 26mm