ASA in Photography - what does that mean?
The acronym ASA stands for "American standards Association" and is used to specify the sensitivity to light. In today's Usage of the ASA corresponds precisely to the value of the ISO-value.
- The light sensitivity of modern cameras is referred to as the ISO-value. This typically ranges from 100 to about 6400, and indicates how sensitive the Sensor is responsive to incident light.
- Here, the ISO, the following applies: the higher The value, the higher the sensitivity. At the same time the noise in images. A smaller ISO value, for longer shutter times and lower image noise.
- ASA is an older unit of measure for the light sensitivity. Similarly, the indication in DIN ("German Institute for standardization used to be") is common.
- Actually, the ISO value, the combination of ASA and DIN values. This has for example the shape of "100/21°".
- Due to the better readability it is usual, as the ISO-value, only the sole ASA value. From ISO 100/21° is become so, in practice, ISO 100, which corresponds to ASA 100.
ASA: What is it?
As you when Shooting the correct ISO-value, we show in the next article.
