this post was submitted on 23 Sep 2025
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If you are measuring fairly, then CRTs do have input lag. You have to take into account the time it takes to stream a frame of video from the connector to the beam to complete the draw. Not doing this is giving CRTs an unfair advantage.
The industry standard is to take the input lag measurement from the middle of the screen. A complete CRT frame in NTSC will take about 16.7ms to stream a frame, so the middle of the screen will be half that. That is, if you press a button to shoot the moment before the frame is drawn and the software miraculously updates the scene before it's streamed out, then a CRT on NTSC has about 8ms of input lag.
For PAL, it's about 20ms to draw a frame, or 10ms of input lag.
Which is interesting, because a lot of LCDs have around 2ms pixel response time. The difference between NTSC and PAL input lag is also 2ms.