If you change the shutter speed then you need to change the aperture to adjust the overall exposure.
For instance if you set the camera up at f16 @1/125 then change that to f16 @ 1/1000 (3 stops) the picture will come out underexposed (very dark).
To counteract that you would need to open the aperture three stops to f 5.6
alternatively if you were to decrease the shutter speed (to 1/60) you would be overexposing (lightening) and you would have to close the aperture to f22 (1 stop)
If you increase the shutter speed then there is less light (darker)
if you decrease the shutter speed then more light (lighter)
tShutter speeds/brightness?
You need to put your camera on %26quot;S%26quot; or shutter priority mode. It takes 3 factors to make your pictures correctly exposed, the main two being the speed of your shutter, and the size of the opening on the lens. You must select the right combination for your photographs to come out correct.
Read your manual and learn to use your light meter, or you can put your camera on %26quot;S%26quot; mode. From there you can select the shutter speed you want, and the camera's computer will select the size of the opening, also known as aperture.
Also, if you select a shutter speed to fast or too slow for the given amount of light, then your picture also won't come out correctly. In which case switch to %26quot;A%26quot; or aperture priority mode, then you will be able to see the fastest shutter speed you can use, and seriously read the manual.Shutter speeds/brightness?
This is a digital camera but any camera lets light in two ways: through the shutter (for an amount of time), through the lens (amount of light). Once you reduce the amount of light with one (ie. faster shutter speed), you must compensate with the lens opening (aperture) to let more light in for the proper exposure. If you simply adjust the shutter speed to 1/1000, you are reducing the amount of light entering the camera and underexposing your image or making it too dark. The opposite happens of course when you go to 8 seconds. Too much light will overexpose and make your image too light. BTW any shutter speed slower than 1/60 will require a tripod to avoid camera shake (blurry picture).
How to do this properly: Your camera's owners manual will show you how to use %26quot;manual mode%26quot; or %26quot;shutter/action freeze mode.%26quot; I'm guessing this camera has that option. In shutter or %26quot;action%26quot; mode the camera should automatically set the correct exposure after you set your shutter speed by opening the aperture to the proper setting. If you have %26quot;manual mode,%26quot; using your viewfinder, just adjust the aperture setting button or reel until the image looks good. An easy way to freeze action:
with camera on %26quot;auto%26quot; mode, keep pushing the flash button until the flash stays on. Forced flash use will almost always freeze the action!Shutter speeds/brightness?
It sounds like you might be in manual exposure mode. While you are varying the shutter speed, you are using the same aperture for each shot.
When you have slow shutter speeds, like 8 seconds, 4 second etc, you are letting in too much light for the aperture you have selected (overexposed), and consequently getting the whole image washed out. If this is a class assignment, that may be what the instructor wants you to see.
At the other end, when you have very short shutter speeds - 1/1000 - you are not letting enough light in and are getting underexposed (black) images.
Somewhere in your experimenting, you probably got 3-4 pictures that were viewable, with maybe one perfectly exposed.
In manual mode, you need to set both the shutter and aperture yourself - there is no help like the other modes. You should see a scale in the viewfinder that lets you know if you are exposing the picture properly. In the middle of the scale means a good exposure.
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