Basics of exposure


Exposing a photo

Determine how bright or dark a photo is. These two factors can be controlled by three parameters:

Apertura

ISO

Shutter speed

Which form the circle of exposure, being correlated.

This theme is very important because it helps you understand how to handle the camera better and how to adjust it depending on where you are, if you are in a room with little light, or natural light.

Any DSLR camera is able to measure the light from the location where you are and will tell you if it is enough to take that image, if it is not enough and will not let you take the picture, a warning will appear in the worst case on red because you don't have enough light and it forces you to open the flash or attach an external one. In this direction the camera helps us a lot.

But if you use a slightly older compact camera, it will probably not be able to offer this precision, although a newer smartphone will also warn you when you want to take a picture that the light is insufficient if you have to use the flash. What I mean by this is that modern technology makes your manual labor a lot easier.

If you didn't understand, rest assured that I will explain step by step again, so:


- The camera measures how much light there is, using the photometer

With this measurement we adjust how much light passes through the lens through the aperture


-Then we change the time the light will enter the sensor with the exposure time

And we adjust how much light the sensor is able to absorb by changing its sensitivity through ISO


1.Expunerea. How do I make a correct exposure?

The exposure can delimit a photo from a simple picture and can completely change its appearance. If you have a DSLR camera or a bridge and you choose to shoot manually, you can do the exposure quite easily but compensating for it can significantly improve the result. Thus, if you are shooting subjects in low light places, and you choose to shoot manually, it is best to follow the exposure meter of the camera which is represented by a grid line, the correct exposure being highlighted by the "O" point.

If the exposure is correct, you will not have burned areas, for its improvement it is recommended to lightly overexpose with 1/3 or 2/3 steps, obtaining a much more pleasant photo. Anyway, first of all you have to test, take a picture, then look to see if the exposure is correct. If you are a beginner, it will be a little harder for you to adjust the exposure to a DSLR camera, but the more you practice, the easier it will be for you to adjust the camera.

Also, the way you adjust the exposure can change the color level in the photo, the underexposure closing all the nuances, the overexposure increasing their saturation but also the contrast. If you want to intentionally underexpose a photo, you have to take into account the noise, because it will be accentuated being inversely proportional to the light intensity in the frame.

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