Convert Skots to Apostilbs
Convert Skots (sk) to Apostilbs (asb) instantly and accurately.
Conversion Formula
asb = sk × 0.001
About Skots
The skot (sk) equals 10⁻³/π cd/m² ≈ 3.183×10⁻⁴ cd/m², defined as one-thousandth of an apostilb. A legacy photometric unit from early German-language vision science. The dark-adapted human eye threshold is around 3×10⁻⁴ cd/m², close to 1 sk. Now obsolete; replaced by cd/m² in SI photometry. 1 sk = 10⁻³/π cd/m².
About Apostilbs
The apostilb (asb) equals 1/π cd/m² ≈ 0.3183 cd/m², defined as the luminance of a perfectly diffuse Lambertian surface with an exitance of 1 lm/m². Introduced by the CIE in 1940 and used in European photometry standards and retinal illuminance calculations. 1 asb = 1/π cd/m² ≈ 0.3183 cd/m².
Quick Reference Table
| Skots (sk) | Apostilbs (asb) |
|---|---|
| 1 sk | 0.001 asb |
| 2 sk | 0.002 asb |
| 5 sk | 0.005 asb |
| 10 sk | 0.01 asb |
| 25 sk | 0.025 asb |
| 50 sk | 0.05 asb |
| 100 sk | 0.1 asb |