Many new cameras have the shutter speed up to 30 seconds or more
which is more than enough for most of the exposures at night or in low light. Besides the fact that they will also have the bulb, setting that will keep the shutter open as long as you keep your finger on the shutter button.
Some cameras can be equipped with bulbs of a system with locking cable release so that possimao way and also do not hold down the shutter button for esposizioni.Se you do not have cable release, you can use the timer option that is on most cameras. This eliminates the vibrations of your hands on the camera.
A tripod is essential because the camera must be anchored to the ground during the time the shutter is open.
If you want a picture of a moving car and highlight the headlights or the rear red lights, 1 / 20 of a second will do, you'll see the display if the picture is as you wanted. If you want to photograph the stars ... first identified the North Star and point the car in that direction, lock the car on the tripod epreparatela exposure to B. .. this picture could take to the sky all night. If your
esppsimetro is unable to recognize the correct opening especially in low light then it would be better to adopt the braketing. That means taking more pictures of the same subject, by changing the speed of capture or by modifying the opening to every shot. In this way we will have different results and we "obviously" choose the best. In a general release "slow" allows for plenty of light inside the camera, which means that we will use a very small aperture (eg 1 / 22) to overexpose the shot.
If you click into the full light we would need a very low ISO (eg 50 to 100) and a neutral density filter to reduce the entry of light.
could try these effects:
Stars on the move: a few hours of shooting
machinery in motion: 5-15 seconds
Falls: 4 / 2 with neutral density filter.
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