An easy way to understand photo exposure is to use the exposure triangle, which consists of three essential elements so that your photo has the right lighting to show all the details you want.
This is the measurement of the light sensitivity of a digital camera sensor.
This is the size of the lens aperture at the time the photo is taken
This is how long the diaphragm remains open, allowing light to enter the sensor.
And it is at the intersection of these three elements that the display of the image takes place.
The most important thing to understand is that changing one of the elements will have an impact on all the others, this means that you can never isolate a single element and change it, you must always have the solution for all three in your head when shooting.
Many people use metaphors to explain the relationship between ISO, aperture and shutter speed and to attach it to the head. Let’s quote three here. But it should be remembered that these metaphors only work for illustrative purposes:
Imagine that your camera is like a window with blinds that open and close.
The opening is the size of the window. If it is larger, more light comes in and the room is brighter.
Shutter speed is how long the blinds are open. The more you leave them open, the more light comes in.
Now imagine that you are in this room and you are wearing sunglasses, with the accessory your eyes are less sensitive to the light coming through the window and it works as a weak ISO.
There are many ways to increase the amount of light entering a room. You can leave the blinds open longer (decrease shutter speed), increase window size (increase aperture) or remove sunglasses (increase ISO).
Another way to understand how digital photography works is to think of it as if you’re sunbathing.
Some people can’t tan because they have very light and sensitive skin; instead, they burn more than anything. Their skin type is like the ISO measure: some people are more sensitive than others.
Shutter speed, in this metaphor, is like the time you spend in the sun. The longer you stay in the sun, the greater your chances of tanning. If you spend too much time in the sun, your skin will burn. Transferring the metaphor to the world of photography means that your image will be overexposed.
The opening is like the sunscreen you put on your skin. The product blocks the sun at different levels, depending on the protective factor. Does applying sunscreen with a high SPF reduce the amount of sunlight that reaches your skin?And as a result, sensitive skin. The person with skin may spend more time in the sun with the product.
As mentioned above, none of these metaphors about photographic exposure is perfect, but both illustrate the link between the exposure triangle, which consists of shutter speed, aperture and ISO in your digital camera.
Mastering the art of exhibition requires a little practice. In some situations, even the most experienced photographers have difficulty choosing the right exposure.
To begin to understand how this system works, keep in mind that every small change in each element of the exposure triangle not only alters the exposure of the image, but also has an impact on all other aspects of it. , have an impact on the depth of the image field; ISO changes can create or reduce the amount of noise in the image, and shutter speed affects how the camera captures motion.
The advantage of digital photography is that it allows many tests, errors and successes until you master a certain technique. You can take as many photos as you want, in different exhibitions, at no additional cost.
Get your photo equipment today and practice!