Well, then my next few blog posts are for you! I'm going to cover the very basics of your camera so you can capture your best images of all of your life adventures. To start, photography is built on three pillars of exposure:
These three lay the foundational knowledge to get the most out of your camera equipment and show off your creativity. Each post will cover one topic and give you the basic information so you will have the expertise to adjust your settings and improve your images. To start, let's cover the fundamentals of ISO!
In very basic terms, ISO is the level of your camera’s sensitivity to available light. The lower the ISO number, the less sensitive it is to light. In bright scenes, a low ISO will suffice because there is plenty of available light for the camera to capture a properly exposed image. While a higher ISO number increases the sensitivity of the camera’s sensor to light, which is very valuable in dark settings.
The ISO setting has two significant relationships:
First, it sets the amount of light needed for a good exposure. The lower the number,the more light required to capture the image. The more light that’s required, the more likely a slow shutter speed will have to be used. Therefore, low ISOs, such as 100 or 200, are most often used in bright settings (sunny outdoor scene) when there is a lot of light available for the image. If the setting is not bright and sunny, a low ISO will probably mean that the camera will need a longer shutter speed to capture a properly exposed image. Therefore, when the setting is dim, a low ISO can be used when the camera is mounted on a tripod to steady the camera for the longer shutter speed. However, if there is not enough light to produce a properly exposed image, or if a faster shutter speed is needed because your subject is moving, then the ISO needs to be increased in order to allow the camera to be more sensitive to light to capture the image. Remember, increasing the ISO makes the camera more sensitive to light. In turn, the camera won't need as long of a shutter speed to capture the image.
Second, ISO determines the amount of noise in the image. In the days of film, high ISO values would produce visible grain in the images. Today, with digital cameras, raising the ISO still has a similar decrease in the quality of the image because it introduces “noise.” Although, most DSLR cameras are capable of producing quality images at high ISOs, such as 1600 and above. In general, I like to keep my ISO below 1600 if I can help it.
The goal is to balance the need for high quality images (low ISO, thus low noise) with a fast enough shutter speed for a sharp photo at your desired aperture.
So here are two life scenarios for you:
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