ICBB looking up the "correct" definition of telescopic, but I feel the need to add MHO.

Most people would understand telescopic (as used) to describe ... something akin in appearance to a stereotypical mariner's telescope. That is, possessing the physical property of lengthening and shortening by intussusception (for want of a better, less medical word). The small bit goes inside a bigger bit, repeatedly. To me, asking if a walking stick was telescopic means you have the desire to collapse it down and store it in a bag, briefcase, or other area of limited space. Which unto itself is quite a nice idea but would probably interfere with the reliability of the stick, unless you were willing to fork out the big bucks. If this is what you were after then the response is perfectly valid. Many walking sticks are adjustable, with different length options, depending on patient size and comfort. If this property was the issue of your enquiry then, IMHO, using telescopic to mean merely adjustable is somewhat obfuscating.