When you want to decrease your shutter speed to shoot a long exposure, like taking a photo of a waterfall to turn the water into a silky-looking flow, you need to decrease the amount of light coming into the camera. One way to reduce the light is by adding a neutral density filter to your lens. A neutral density filter reduces the light entering the camera without changing the color of the light. By reducing the light, to arrive at the same exposure value -- that is, the amount of brightness -- you lengthen the shutter speed, which blurs the image.
Instructions
- 1
Set your camera's ISO to 100 or its lowest value.
2Frame your subject with your camera and note the exposure. The exposure is the combination of the shutter speed and the f-stop. Find the values displayed inside your camera's viewfinder. For example, on a sunny day a common exposure is a shutter speed of 1/125 and an f-stop of 16.
3Screw the neutral density filter to your camera's lens.
4Determine how many stops of light the neutral density filter removes. Most labeling systems list the common neutral density filters as 2x, 4x or 8x. This means 1-stop, 2-stops or 3-stops of light removed, respectively. Darker filters reduce the light further; refer to the filter's instructions to find out by how much.
5Decrease the shutter speed by the number of stops of light removed. Do this by halving the shutter speed for each stop. For example, if the shutter speed is 1/125 and you remove two stops of light, then the shutter speed becomes 1/30. When you halve 1/125, you get 1/60, and for the second stop of light you halve again and get 1/30. For a third stop of light, the shutter speed becomes 1/15.
6Set the new shutter speed on the camera using the appropriate dial.
When you want to decrease your shutter speed to shoot a long exposure, like taking a photo of a waterfall to turn the water into a silky-looking flow, you need to decrease the amount of light coming into the camera. One way to reduce the light is by adding a neutral density filter to your lens. A neutral density filter reduces the light entering the camera without changing the color of the light. By reducing the light, to arrive at the same exposure value -- that is, the amount of brightness -- you lengthen the shutter speed, which blurs the image.
Instructions
- 1
Set your camera's ISO to 100 or its lowest value.
2Frame your subject with your camera and note the exposure. The exposure is the combination of the shutter speed and the f-stop. Find the values displayed inside your camera's viewfinder. For example, on a sunny day a common exposure is a shutter speed of 1/125 and an f-stop of 16.
3Screw the neutral density filter to your camera's lens.
4Determine how many stops of light the neutral density filter removes. Most labeling systems list the common neutral density filters as 2x, 4x or 8x. This means 1-stop, 2-stops or 3-stops of light removed, respectively. Darker filters reduce the light further; refer to the filter's instructions to find out by how much.
5Decrease the shutter speed by the number of stops of light removed. Do this by halving the shutter speed for each stop. For example, if the shutter speed is 1/125 and you remove two stops of light, then the shutter speed becomes 1/30. When you halve 1/125, you get 1/60, and for the second stop of light you halve again and get 1/30. For a third stop of light, the shutter speed becomes 1/15.
6Set the new shutter speed on the camera using the appropriate dial.
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