I have a technical question for you Optics experts. I have a Leupold Mark 4 4.5-14X50 Leupold says that the parallax is adjustable down to 75 yds. I understand what parallax is, but my question is at 25 yds how much will that affect accuracy? How much at 50yds? Is there a formula for calculating this? Is there anything out there to help correct this?









