Hello. I bought second hand nikko diamond 10-50x60,mk2. It can focus on 7,5 meters,and maximum on 50 meters. The previous owner said to me that he made it like that,so i suppose it has 50 ft focus adapter. My question is,how i remove it so the scope return on its natural stage? I read that 50 foot adapter fits into the flip up on the front of the scope,but i dont see nothing there. Is it possible that he did something else to reduce lowest focus to 7,5 meters.? Thank you.