In our modern world of automatic cameras, which focus for us and adjust the exposure in an ever more perfect way (most of the time), the biggest difference between a good photograph and a mediocre one is the composition.
In every photograph we take, we can decide where the boundaries of that photo will be, called the cropping. We can also choose the viewpoint. If we are taking pictures of people or movable objects then, often, we also have the opportunity to arrange them into the shapes we want.
When you take a picture with your camera set on Auto mode, you are delegating responsibility for determining the correct exposure to the camera. Depending on the 'brain' (or programmed chip) inside your camera, the result may be pleasing or not to your satisfaction. But before you blame the camera for your lousy pictures, it pays to understand a bit what goes on behind the scenes when you press the shutter release button. In this tutorial, we are going to look at what 'correct exposure' means.
Knowing how your digital camera meters light is critical for achieving consistent and accurate exposures. Metering is the brains behind how your camera determines the shutter speed and aperture, based on lighting conditions and ISO speed. Metering options often include partial, evaluative zone or matrix, center-weighted and spot metering. Each of these have subject lighting conditions for which they excel-- and for which they fail. Understanding these can improve one's photographic intuition for how a camera measures light.
Using a camera flash can both broaden the scope and enhance the appearance of your photographic subjects. However, flash is also one of the most confusing and misused of all photographic tools. In fact, the best flash photo is often the one where you cannot even tell a flash was used. This tutorial aims to overcome all the technical terminology in order to focus on the real essence of flash photography: how to control your light and subsequently achieve the desired exposure.
The exposure is the combined factors of how long time the sensor is exposed to light, how much light comes through and how sensitive the sensor is to light. It’s based on three things, Aperture size, Shutter speed and ISO.
This how-to video is part of a series about using the histogram to create properly exposed images with your camera. This first installment explains in simple language what is the histogram and how to read it.