If you're into this sort of thing I recommend reading this article: http://www.tftcentral.co.uk/articles/input_lag.htm http://www.tftcentral.co.uk/articles/inpu

If you're into this sort of thing I recommend reading this article: http://www.tftcentral.co.uk/articles/input_lag.htm http://www.tftcentral.co.uk/articles/input_lag.htm It goes into a lot of depth on input lag and how to measure it accurately. The site also happens to have recorded input lag numbers for hundreds of monitors. In the article it mentions using photo sensors and oscilloscopes as the best way to get a reading but they settle on using a special type of stopwatch test that gets results that are nearly the same.