Differences Between Low ISO and High ISO, and How to Reduce Noise Without Compromising Image Quality | Knowledge #86
Cover image by the Oji brown
ISO settings are a crucial factor that greatly impact the brightness and texture of photos. High ISO and low ISO need to be used differently depending on the shooting conditions, each having its own advantages and disadvantages.
This time, we will introduce the differences between high ISO and low ISO, their impacts, and recommended ISO settings for different scenes. Understand the basics of ISO sensitivity and aim for photography that maximizes your camera's performance!
Image by 月夜花音
Advantages and Disadvantages of High ISO
High ISO is very effective in dark environments or scenes requiring fast shutter speeds. For example, in nighttime street photography or when using a telephoto lens, setting a high ISO allows you to capture bright and sharp images even when shooting handheld.
However, high ISO has the disadvantage of increased noise. This is particularly noticeable in dark areas, which can degrade the texture and detail of the image. Additionally, the dynamic range may narrow, limiting the expression of highlights and shadows.
Advantages and Disadvantages of Low ISO
Low ISO is ideal for obtaining clean and sharp images. In environments with sufficient light, such as bright outdoor or studio photography, setting a low ISO results in clear images with minimal noise. Moreover, low ISO offers a wide dynamic range, richly expressing gradations from highlights to shadows, making it suitable for landscape or art photography.
However, in environments with insufficient light, the shutter speed slows down, increasing the risk of camera shake or subject blur.
Native ISO and Dual Native ISO
Cameras have a "Native ISO" range, within which shooting yields optimal image quality. "Native ISO" refers to the sensitivity range where the camera sensor performs most stably, and shooting within this range is recommended.
Some recent high-performance cameras are equipped with a technology called "Dual Native ISO." For more about "Native ISO" and "Dual Native ISO," please refer to the article below.
Image by ICHIHO
Guidelines for ISO Settings by Scene
Choosing the optimal ISO setting requires understanding the shooting scene and the characteristics of your camera. Below are general guidelines for ISO settings. Recently, "Auto" settings are also available, so make use of such features to aim for photography that maximizes your camera's performance!
🌞 ISO 100~400
Shooting in environments with ample light, such as sunny days or studios
☁️ / ☂️ ISO 400~3200
Shooting outdoors on cloudy or rainy days, or at night, where light is insufficient
🌚 ISO 3200~
Shooting in dark rooms or outdoors without streetlights
