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Shooting Forum - Firearms licencing information


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Adjustable objectives.

  • 19-11-2008 03:59PM
    #1
    milkerman
    Closed Accounts Posts: 460 ✭✭


    Can anyone tell me the purpose of adjustable objective lenses?
    Got a Nikko last week and zeroed at 25m, moved out to 60m and the bullet strike moved about 3 inches to the right. I rezeroed for windage at 60m and moved back to 25m - Guess What? the bullet strike had moved to the left.

    I have countered all this by setting the lens to 60m where I do most of my shooting and only using the lower magnifications at closer ranges where high x powers are not needed. This seems to work.

    Is it the usual or did I buy a crock?


Comments

  • #2
    Vegeta
    Registered Users, Registered Users 2 Posts: 11,392 ✭✭✭✭Vegeta


    They are used to counter parallax error afaik

    I personally prefer the side focus design.

    With the adjustable objective, I find if the rifle encounters a small bit of grit or dust the adjustable objective then becomes like a pepper grinder when twisting it. I also find when prone it is quite difficult to reach forward and twist the objective.


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