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Shooting Forum - Firearms licencing information


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Quick question

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  • 20-12-2011 10:50pm
    #1
    gearoidol
    Registered Users Posts: 519 ✭✭✭


    I have a cz style with hawke scope. If I adjust focus(not zoom) on scope will this disturb my zero


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    #2
    Bananaman
    Registered Users Posts: 1,641 ✭✭✭Bananaman


    gearoidol wrote: »
    I have a cz style with hawke scope. If I adjust focus(not zoom) on scope will this disturb my zero

    You are probably changing focus because you are changing distance - if it is a decent change in distance.it would affect.your zero as the round would be starting to drop

    What distances are you talking about?

    B'Man


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    #3
    gearoidol
    Registered Users Posts: 519 ✭✭✭gearoidol


    I zero'd at 60 yards but I think the focus needs to be adjusted slightly will that change the zero


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    #4
    BELOWaverageIQ
    Closed Accounts Posts: 703 ✭✭✭BELOWaverageIQ


    gearoidol wrote: »
    I zero'd at 60 yards but I think the focus needs to be adjusted slightly will that change the zero


    NO


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    #5
    One shot on kill
    Registered Users Posts: 2,247 ✭✭✭One shot on kill


    very good question but no clear your focus you should be ok

    what would happen when you change zoom and were talking about distances with a 22


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    #6
    extremetaz
    Registered Users Posts: 1,391 ✭✭✭extremetaz


    Focus won't change the zero and should only need to be set once for your eye and that's it.

    Parallax on the other hand will vary with range and is very noticable if your target is closer than 100m and you're using high mag (Reticle will be in focus - target will not).

    Be aware that if you have to shift your parallax then you've obviously changed your range to target, so your point of impact will change accordingly.


    In order to tell the difference between the two easily - focus adjustment is usually at the eyepiece.
    Anything else (sidewheel or adjustment at the objective end) is parallax - not focus.


    @ One shot: Depends on the scope. First plane scopes will hold zero but the reticle size will change. Second plane scopes will preserve the reticle but the zero may shift (or at least that's my understanding or the difference between the two). Most scopes are second plane.


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