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Long Range Hunting & Shooting
How does sunlight affect your POI?
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<blockquote data-quote="Michael Eichele" data-source="post: 438772" data-attributes="member: 1007"><p>This is a common variable that has to be compensated for just like pressure, temps, etc.....</p><p></p><p>Various sun angles will cause a shift in where you perceive the target to be. When the sun is low on the horizon behind you versus infront of you or to your left or right or any other combination or when it is seriously overcast, your perception of the target changes. Even though your crosshairs are perceived to be in the middle of the target. Have you ever shot at a target at medium to longrange in a 9Oclock or 3Oclock wind in the heat and mirage? If so, you probably have noted that the target appears to move in the direction of the mirage which is moving in the direction of the wind. You will be aiming at the target and then just before your trigger breaks, the wind lets up for a few seconds. What happens? The target appears to move back to where it started which moves it off of your point of aim. It isnt the target that moves, rather it is your perception of the target. Different sun lighting angles and conditions has a similar effect on target perception. As far as compensating for it, learn what effects differnt angles have on your POI and make field adjustments for it when you 'set up' for a long shot. Personaly, I zero my rifles when it is densely overcast (which isnt hard to do up here) and that becomes my 'baseline' zero. Then I adjust accordingly.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 438772, member: 1007"] This is a common variable that has to be compensated for just like pressure, temps, etc..... Various sun angles will cause a shift in where you perceive the target to be. When the sun is low on the horizon behind you versus infront of you or to your left or right or any other combination or when it is seriously overcast, your perception of the target changes. Even though your crosshairs are perceived to be in the middle of the target. Have you ever shot at a target at medium to longrange in a 9Oclock or 3Oclock wind in the heat and mirage? If so, you probably have noted that the target appears to move in the direction of the mirage which is moving in the direction of the wind. You will be aiming at the target and then just before your trigger breaks, the wind lets up for a few seconds. What happens? The target appears to move back to where it started which moves it off of your point of aim. It isnt the target that moves, rather it is your perception of the target. Different sun lighting angles and conditions has a similar effect on target perception. As far as compensating for it, learn what effects differnt angles have on your POI and make field adjustments for it when you 'set up' for a long shot. Personaly, I zero my rifles when it is densely overcast (which isnt hard to do up here) and that becomes my 'baseline' zero. Then I adjust accordingly. [/QUOTE]
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How does sunlight affect your POI?
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