Hello. I am new to the sd and from the u.s.you gentlememen are much more wise in low light scope performance than most americans.so i come to you asking info on docter scopes.we have a few at my gun dealer and i can buy one for considerably less than a diavari,swarovski or s&b.i can buy new for $500 u.s. Dollars.whereas the big 3's are $1200-$2000us.dollars.i hear mixed reviews though.even my dealer says they are = to a zeiss conquest.not that a conquest is bad,i have one and think they are nice but not a diavari.then there are others who say docters are right up there with the big 3.your thoughts?