hello , now i have herd talk of focusing scopes to make it easier to work out certan ranges . now the bug bear for me is those shity little ranges of 8yd 10 yd 13 yd . i zero at 25yrd and pa @25 if i blured at say 13 yrd would it still be clear at 45 yrd . . i know some slightly blur it at 45 to give them the range . im just at a loose end of what to do or the best way to do it .oh and i use an mtc 10x44 and would asume anyone using the same scope would know .