English site may be down or very slow.
ZD is the military range.
Assuming you mean pa adjustable ie to rangefind there will be better options for the money. Site down but think its the variable up to 16mag, hardly any use what so ever for accurate ranging.
However i am a real lover of Meopta stuff they go in Series numbers over here 2000, 2100, 3000 & 3100.
3000 series half the price of equivalent Kahles, similar build and only edge to edge yellow tinging in sun were the only discernable difference. The only scopes i would not have in the line are the 3-9 and 4-16.
Clarity even on the 2000 series is far better than a Leupy Vari x 3 and VX3 equivalent.
Depends upon what range you want to estimate and how accurate ignoring the human factor, the more mag usually the easier to rangefind and the higher the cost. What price range? and max mag useable?