Stereo with ds-2cd2t43g2-2i, distance?

i have this camera and wanna to stereo two of them. real lot of text but im beginner.
1- can help me about, how much is max distance i can get with which baseline?
2- can i use this with baseline of 20cm or must decrease it?
i want to remove background from target moving object. wanna to get distance of object from stereo and remove pixels with distance threshold.
Thanks for helping.