How to set shutter speed in a low light?

7 Answers

  • 2 months ago

    there is usually a TP function which allows you to adjust the speed manually with a thumb wheel

    read the manual for camera model

  • 2 months ago

    A long exposure will be needed. To achieve this you will need to work out what is most important for the subject. If it is a moving subject you will need to retain as high a shutter speed as possible depending on how well your camera handles higher ISO levels. Using a tripod will help control camera shake.  If it is a static subject and the illumination does not change, then you need to eliminate camera shake, ideally by using a tripod. You will have more latitude here with aperture, with which to isolate the subject from the background; meaning that the ISO (and digital noise) probably do not need to be very high. If working outside at night, you won't want to lose your night vision while looking at the LCD panel on the camera; so keep one of your eyes closed while it is illuminated.

  • 2 months ago

    It depends on ISO and aperture - like always!

  • Anonymous
    2 months ago

    You can set the meter mode dial to AV or Aperture priority, and then set the aperture to about 1 stop less than the maximum. For example, if the lens has a maximum aperture of f/2.8, set it to f/4 and then let the camera set the shutter speed. You may even need to set the aperture to the maximum if the shutter speed is not fast enough to prevent blurring. 

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  • keerok
    Lv 7
    2 months ago

    Really long.                                       .

  • Sumi
    Lv 7
    2 months ago

    Your question is a bit vague.  Which camera are you using?  What mode do you want to be in?  How low of a light?

    Normally you just set the shutter speed and let the camera do the rest.

    Are you getting an error because your aperture cannot open up enough for the shutter speed & ISO setting you want to use?

    Regardless of low light or bright light, simply choose the shutter speed you want to use and the camera will indicate whether it can choose an aperture & ISO combination that will result in an acceptable exposure.

    There are times where this can be rather tricky such as in night shots where the camera set to, say, ISO 100 will give you an exposure with a blinking shutter speed of 30" and a blinking aperture.  In this situation, the camera is telling the user that at the current ISO setting, there is not an exposure setting that the camera can automatically make that will result in a proper exposure.  Even at the maximum aperture at the longest shutter speed that the camera can choose, the image will still be underexposed.

    In this situation, you need to increase the ISO so that the camera will be able to choose a shutter speed & aperture combination within its control.  Say, for example, you're shooting in Program or Auto and the LCD shows a blinking 30" and your ISO is at 100.  If, for example, increasing the ISO to 400 still results in a blinking 30", ISO 800 also still has a blinking 30", but then at ISO 1600 the camera shows a solid 30" at, say, f/4 (hypothetical maximum aperture for this example).  At this point you have a few options:  1) You can take the photo at ISO 1,600 with the indicated exposure of 1/1000th @ f/4.  2) You can note that from ISO 100 to ISO 1,600 is 4 stops.  Thus if you lower your ISO back down to 100, you will need to use a shutter speed that is 4 stops longer than 30 seconds, which comes out to an 8-minute exposure in this example.  In order to keep the shutter open for longer than 30 seconds, you will need to put the camera into bulb mode.

    If you were shooting in aperture priority, the steps would be the same.  Set an aperture.  Get a blinking 30" shutter speed in the LCD.  Increase the ISO until the shutter speed stops blinking and then either take the shot, or put the camera in manual mode and set the aperture & shutter speed manually adjusting for the difference in stops between the original ISO and the one where the number stops blinking.

  • 2 months ago

    need slower shutter (longer exposure) as a general idea. Basically, the film or whatever detectors you have if digital camera, respond to a total energy received, and energy continues to be collected for as long as the shutter is open. Low light means low energy intensity so less energy per unit time, and thus you need to respond by opening the diaphragm (iris, FStop) and/or increasing exposure time to get to the target total energy exposure (what the detectors need to respond accurately).

    There are impacts from such changes though.  Longer shutter speed leads to blurring of images. Sometimes, like with water flowing over rocks, that might be exactly what you want.  Depth of field is affected by changing F-stop, if your camera has that option.

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