What is the range of depth map

[jingyao666666]

Hi,all
I used the depth convertion formula（Depth (meters) = (256 * 256 * B + 256 * G + R) / (256 * 256 * 256 - 1) * 1000 ）to read depth map and noticed that the maximum value of depth is 3.9216,is that correct? So the farthest distance is 3.9216 meters?

Thanks a lot!