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?
In: Technology
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.
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