Adj Objective necessary?

Discussion in 'Long Range Scopes and Other Optics' started by Jason, Feb 3, 2007.

  1. Jason

    Jason Member

    Jul 20, 2001
    I Have a 7mm/08 which I am going to have rechambered to 7mm/08 improved. I would like to use it to shoot out to 600yds. Do I really need an adjustable objective? At what range do they become essential.
    P.S This forum is great, Thanks to everyone.
  2. royinidaho

    royinidaho Writers Guild

    Jan 20, 2004
    Not gospel but what I "think" I know.

    Fixed power and scopes w/o AO are set to be parallax free at a specific distance. Having said that I've made some long shots with a Leupold VX II 2x9 but not over 425 yards.

    With the Super Sniper 10X and 16X and the Weaver Tactical the AO is a must at ranges up to 1K, which is as far as I am able to shoot due to range length.

    My short answer would be, yes.


  3. Chrismadrid

    Chrismadrid Well-Known Member

    May 28, 2005
    NEED? it will depend what magnification you shoot at.

    They HELP at any magnification for precision work as they will eliminate errors due to parallax - they really come into their own at HIGH magnifications where the depth of field (not width of field, aka FOV) reduces considerably (i.e. you'll loose focus) and ESPECIALLY close in!

    Most decent top end scopes have some form of adjustment where logic demands it.

    If you were going to shot (as an example) ONLY at 600yds however, yes I'd consider a fixed lens and have it reset to be Parallax free at that distance.