<Li> ​ ⁄ s and ​ ⁄ s: This and slower speeds are useful for photographs other than panning shots where motion blur is employed for deliberate effect, or for taking sharp photographs of immobile subjects under bad lighting conditions with a tripod - supported camera . </Li> <Li> ​ ⁄ s, ​ ⁄ s and 1 s: Also mainly used for motion blur effects and / or low - light photography, but only practical with a tripod - supported camera . </Li> <Li> B (bulb) (fraction of second to several hours): Used with a mechanically fixed camera in astrophotography and for certain special effects . </Li> <Ul> <Li> <P> Star trails like these are created by using a long exposure to capture the apparent motion of the stars . </P> </Li> <Li> <P> The Whirligig ride during night at SFGAm at an exposure time of 0.8 seconds . </P> </Li> <Li> <P> Light streaks outside London Waterloo station . </P> </Li> <Li> <P> Effect of different shutter speeds on photograph . </P> </Li> <Li> <P> A 30 - second exposure of the rotating New Technology Telescope </P> </Li> </Ul>

What is the use of shutter speed in dslr