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Question Parralax Adjustment

Discussion in 'Anything Airgun Related' started by Stevematthews79, Apr 27, 2008.

  1. Stevematthews79

    Stevematthews79 Active Member

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    Parralax adjustment - I've got it on my scope but usually set it at 25 and leave it there. Can anyone explain what it is there for and if its necessary for the distances that most Air weapons are used at (non FAC). Can it hinder more than help if you are busy fiddling with the parralax ring rather than aiming - don't know about your bunnies but mine aren't all that good at hanging around while I fiddle with dials. I've tried asking them nicely but they just don't seem to listen :D
     
  2. sumo

    sumo Posting Addict

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    Hi Steve
    I only set it once on my scopes.
    Its pretty much a case of setting the cross hairs as finely as you can so as to not obstruct the target.
    Once set it should be fine for all ranges though.
    cheers
    Sumo
     
  3. Buzz

    Buzz Banned

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    I thought it was the other way round. The ring at the eye end is used to get the reticle focussed and the other end is used to focus the target and give you a close idea of range. If I'm wrong, why do SWAT scopes use a BIG wheel on the side for focussing?
     
  4. sumo

    sumo Posting Addict

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    Hmm cant speak for SWAT,however I do know that ARU and special forces DO NOT gave the big wheel focus on their scopes for obvious tactical reasons ie catching on branches etc and throwing off zero.
    And thats fact.
     
  5. Buzz

    Buzz Banned

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    Sumo, I didn't mean SWAT as in Special Weapons And Tactics, I meant it as Side Wheel Adjustable Turret. It just brings the focussing into a more easily accessible position, i.e. on a turret like windage adjustment turrets, but again for ease they can be fitted with a bigger wheel.
     
  6. sharpshooterpete

    sharpshooterpete Donator

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    parallax adjustment makes your target look sharper depending on the distance, if your shooting at 10 yards and your AO has 10 yards turn it to that and your target become very clear.

    the scope i have at the moment does not have AO and when im shooting at 20 yards on full mag (x9) it is pretty hard to see the target because its blurry but if you have AO you can turn the objective to 20 or 25 depending on what you have and that allows you to have your scope on full mag and also see the target clearly.
     
  7. a1gunner

    a1gunner Pro Poster

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    helps with range finding.

    zoom in at tune till the sipe picture is right, read the range off the PX
     
  8. Andy

    Andy Administrative Staff Member Founder

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    Eh.....:shrug:must be in Welsh. :D
     
  9. a1gunner

    a1gunner Pro Poster

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    zoom to top mag.

    using the px make the picture clear.

    read off the range from the PX wheel
     
  10. FXpoacher

    FXpoacher Engaging Member

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    :D:D:D
    Can we have a spellchecker please!!!:D
     
  11. Andy

    Andy Administrative Staff Member Founder

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    He needs to install ieSpell if using IE then after typing a post press the ABC option. :D:up:
     
  12. a1gunner

    a1gunner Pro Poster

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    shut up:rolleyes:

    spellins fine ya just gotta read it twice:p
     
  13. Andy

    Andy Administrative Staff Member Founder

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    (Spellings fine you just got to read it twice) please keep all forum post's in English, it's in the forum rules. :thefinger2:
     
  14. a1gunner

    a1gunner Pro Poster

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    wel gallen i cadw at y rholau on mae yn fwy o sport i torri nhw:eek::D
     
  15. Buzz

    Buzz Banned

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    Who's hitting who with this friggin' rolling pin ????
     
  16. topcat

    topcat Posting Addict

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    Yip parralax adjustment can be used to range find. the higher the magnification the better it gets at range findig. they are very accurate too i use 20 times mag and can range find very accurately out to over 65 yards
     
  17. a1gunner

    a1gunner Pro Poster

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    not a practical method when hunting though:(
     
  18. DKOwen

    DKOwen Member

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    Parallax, Yankee style.....

    Parallax is, by definition, the apparent shift in objects when viewed from different positions. The same as the hood ornament is only lined up with the pedestrian from the driver's seat, to the passenger it looks like you could miss.

    In practice it's when you move your eye a little bit and the cross hairs seem to move against the target (clearly a problem if you're trying to line one up with the other....it's perfect from only one eye position....).

    In optics terms you need to have the image of the target and the cross hairs focused at the same point within the scope, sometimes called the back focal plane of the objective.

    The 'by the book' way to set this is to block your rifle on bags or similar so it doesn't move. Then looking though the scope at the cross hairs against some image, to 'the head bop', that is move your eye back and forth, up and down a bit and see what happens. If you're under focused the cross hairs will move one way, over focused and they go the other. You want the point where it doesn't move, no matter what the range marks say. The ocular (eye piece) focus is used to bring the image of the cross hairs into sharp focus, set it against a blank background. But do that part quickly, don't let your eye refocus, that's not the goal.

    All scopes have this adjustment, it's just that most are fixed at the factory, 100 yards for CF scopes, 50 for RF being the standard. At longer ranges it doesn't matter as much, notice how the range numbers bunch up at the top end? Since airguns are shot at short range, we really need Adjustable Objectives.

    Yes, they can be used for range finding. High mags and large diameter Objectives help here as they make it more critical. The real use of AO is, however, to eliminate parallax errors at one range to give the best possible accuracy not the most in focus image.

    BTW, here in the colonies we spell parallax with more Ls and less Rs than you seem to 'over there'. Fair enough, it's a funny language but you invented the thing, didn't you, we just pinched it 'cuz it was handy.....hey, we nearly choose German....

    Doug Owen
     
  19. topcat

    topcat Posting Addict

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    I use it to great affect when hunting
     
  20. FXpoacher

    FXpoacher Engaging Member

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    i know an electric motor fitted to the mount driving a whe..............

    Oh no it's been done

    Sorry topcat, saw i used the wrong quote:eek:
     

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