Note that the G403 is moved first and thus receives a slight head start. In this case, the control subject is a G403, whose 3366 has no visible smoothing across the entire CPI range. As there is no way to accurately measure motion delay absolutely, it can only be done by comparison with a control subject that has been determined to have the lowest possible motion delay. The goal here is to have as little smoothing as possible. The main thing I'll be looking for in this test is sensor smoothing, which describes an averaging of motion data across several capture frames in order to reduce jitter at higher CPI values, increasing motion delay along with it. Any further sources of input delay will not be recorded in this test. Motion Delay"Motion delay" encompasses all kinds of sensor lag. In order to account for the measured deviation, adjusted steps of 400, 800, 1550, and 3100 CPI have been used for testing. As you can see, deviation is consistently positive and somewhat significant. I've restricted my testing to the four most common CPI steps, which are 400, 800, 1600, and 3200.
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