ISO – Beginner Photography

Understanding ISO in Photography: A Beginner’s Guide
ISO is one of the three key settings in photography, along with shutter speed and aperture. It controls the camera’s sensitivity to light. A lower ISO (e.g., 100 or 200) is ideal for bright conditions, while a higher ISO (e.g., 800 or 1600) helps in low-light situations. However, increasing ISO can introduce grain or “noise” in your images. Understanding how to balance ISO with shutter speed and aperture is crucial for achieving the perfect exposure, whether you’re shooting outdoors in daylight or indoors at night.

ISO – LEARN PHOTOGRAPHY

ISO is the digital equivalent (or approximation) of film speed. If you remember, you would get 100, 200, 400, or 800 back in the day. This applies to digital photography, but it’s called ISO instead of ASA. It’s still the same: 100 and 200 for outdoors with a lot of light and 400 and 800 for indoors with less light. The same rule applies: the higher the number, the more light comes in.

General rules for ISO settings

The lowest settings are 50, 100, and 200, depending on the camera. It is for FULL SUNSHINE. (Some high-end cameras have 50)
ISO – 400 – overcast, cloudy, not so much sun.
ISO – 800 lower light – sunset time and so on.

Digital Noise

The level of noise in a photograph is determined by the camera used. Typically, noise appears at ISO 800 and becomes more noticeable at ISO 1600, although this can vary depending on the camera’s specifications.

High ISO settings are known for introducing noise or grain into photographs. While some artists may use it as an artistic effect, many photographers strive to avoid it. However, there are exceptions, such as when photographing ghosts.

To reduce the amount of noise in your images, it is essential to understand how this function affects the exposure. Increasing the ISO will result in a brighter image, while decreasing it will darken it. Shooting outdoors and experimenting with different levels can help you visualize the effects of each increment on your photos.

In photography, grain (or digital noise) is common, especially in low-light situations. Darker areas in an image tend to show more digital noise than brighter ones. Various editing tools can be discussed in further detail later to achieve high-quality results and decrease grain in your photos.

PHOTO TIP: When adjusting ISO, remember: high numbers might make your shots clearer, but your photos may also start to look like they were shot through a snowstorm.

Grain or Digital Noise Examples

Here is an example of grain in a picture. On the left. The stuff on the right is what you will need to edit your photos, and we highly recommend everything we advertise in our magazine.  Back to learning, the darker parts of images are where you will see more digital noise or grain. Grain is prevalent in night photography. Let’s talk about night shots.

ISO - Beginner Photography

Night Photography

When shooting still photos in the dark with a tripod, the ISO should always be set to 100 or the lowest available number (except for Milky Way shots and times you need to let more light in). This is because increasing the ISO will result in noise. A tripod gives you two other ways of allowing more light into your photo: decreasing the shutter speed and adjusting the aperture. Reducing the shutter speed is an excellent idea since we can keep it open for a long time without blurring due to camera shake when on a tripod.
When using a tripod, we can keep our shutter open for an extended period when the subject is motionless and there isn’t much light. Holding the camera in our hands won’t work for this, as any exposure below 1/50th of a second or so will produce blurry images. We can take crystal-clear night photos by securely mounting our camera on a sturdy tripod. When you feel confident with your tripod set-up and shooting technique, check out our How to Shoot Night Photography Section
ISO - Beginner Photography
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Homework:

Please review the settings on your camera and observe the various increments. For those familiar with shutter priority, I recommend setting your shutter speed to 1/200th of a second, taking photos at 100, 200, 400, and 800, and all increments up to the highest setting. You will notice an increase in brightness as you increase the levels. If you perform this experiment in low light conditions, pay attention to the graininess that becomes more pronounced at higher ISOs.

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