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Adjustable Objective

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Adjustable Objective

Old 02-26-2002, 11:45 AM
  #1  
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Join Date: Feb 2003
Location: Missouri USA
Posts: 94
Default Adjustable Objective


I kinda have an idea of what adjustable objective scope is, but not for sure. I know that there are yardage numbers on the outside of the objective lens. Can you sight in your gun to a certain yardage, 100 for example, and then dial up the scope for 125, 150, 200,....... Will the bullet then be directly on at these ranges. I need some info, bout to go crazy racking my brain. Almost seems impossible to me w/all the different guns and calibers.
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Old 02-26-2002, 12:00 PM
  #2  
bigcountry
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Default RE: Adjustable Objective

NO. AO is not to compensate for bullet drop whatsoever. When you look down a scope, have you noticed you can move your head/eye and the target don't move even though your line of sight is not parrallel with the scope. Well when you get out to long ranges >200 yards, these slight head movements will make your abjective (target to not be where it appears in your crosshairs). AO helps to compensate for this by making the scope pararllax free. Most all scopes unless otherwise noted are factory set to 150 yards. So the maximum error for a typical VarII is 8/10" at 500 yards. Most shooters will never know the difference. And as long as your eye is perfectly parrellel with the scope (impossible), you will never have to worry about that 1000 yard shot.

To quote Leupold's home page:
Parallax is essentially an optical illusion. It is the apparent movement of the target relative to the reticle when you move your eye away from the center point of the eyepiece. It occurs when the target does not fall on the same optical plane as the reticle.
 
Old 02-26-2002, 01:01 PM
  #3  
 
Join Date: Feb 2003
Location: Grove City PA USA
Posts: 132
Default RE: Adjustable Objective

bigcountry hit the nail on the head. I'd like to add that you can't go with the distance markings that are printed on the Adj. Objective as they are incorrect more often than not, even on higher quality optics. Best thing to do is put some tape on the scope and mark your own distances where the parallax error is zero.
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