I’m not a photographer but I have some basic knowledge of some terms. For example, when you take a longer exposure of a photo It should allow more light to enter the lense. Wouldn’t that make everything completely overly bright. However, I see many photos that look like time is just stretched like taking a time lapse. How does this work?
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The bit you’re missing is how the light gets in to the camera – it goes through a hole which the operator can change the size of. The size of the hole is known as the aperture and is measured in f stops. small number = big hole, little number = small hole.
By making the hole very, very small it limits the amount of light getting in, thus the picture is not “too light” or over-exposed.
Aperture, shutter (how long the hole is open for) and ISO are the three points of the exposure triangle. Each of them can be adjusted to provide a correctly exposed picture and each of them have an effect on the final image which might or might not be desirable in any given situation.
It does. When taking longer exposures in daylight, you can use what’s called neutral density filter to limit the amount of light that enters the camera, so the image does not become overexposed.
Most professional time lapse photos are done with a filter that reduces the amount of light that comes in. If you were to take a normal exposure shot with the same filter it would appear very dark.
Lower iso? Iso is a camera’s sensitivity to light, so a lower setting would offset any brighter objects from a slow shutter speed.
It does get brighter, that’s why you either take picture of something very dark, like night sky. Or you make the picture very dark by aperture settings/sensitivity or filters. Or make the picture darker later, in photoshop.
In addition to the methods others have said, there is something called a neutral density filter, which attaches to the front of the lens and blocks a certain percentage of all the light coming in. (Basically sunglasses for the camera.)
A friend of mine used two strong ones to take ~30 second exposures in the middle of the day for a project he did.
It does get brighter the longer the shutter. You make up for it by narrowing your aperture, lowering your ISO, and using filters to darken the shot
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