i didn't give the fast focus models all that much thought until my eyes did that funky thin when i turned 42 a while back (7 yrs ago)and i needed glasss to read the paper. but my kids eyes are like a hawk, when my son started to shoot my rifle and the scope setting wasn't to his satisfaction he was strugling to shoot. now he dials in his eyes and dial in mine, much easier than the older models.
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