SDR

Standard dynamic range (SDR) has traditionally been the baseline for video and film content, preceding the innovations in high dynamic range (HDR) technology.

When it comes to monitors and televisions, SDR's brightness is limited compared to HDR. SDR typically measures up to about 100 nits in brightness, a contrast to HDR's potential to reach up to 10,000 nits.

The main difference isn't just about brightness, though. SDR offers a narrower spectrum of colours and a smaller dynamic range, akin to seeing a rainbow with fewer shades in between its main colours.