Power Adjustment Problem on Sightron SIII

Discussion in 'Long Range Scopes and Other Optics' started by bryceh12321, Apr 16, 2009.

  1. bryceh12321

    bryceh12321 Well-Known Member

    Mar 16, 2009
    I was just wondering if it is normal for the power adjustment to be really hard to turn. I can get it with one hand but it sure is harder to turn then my cheap Barska, which is the same power, and harder to turn than about any scope I've ever come across. Just wanted to make sure nothing is wrong with it. Thanks.
  2. phorwath

    phorwath Well-Known Member

    Apr 4, 2005
    The power ring on mine turns easily. If you overtighten the scope ring near the power adjustment ring, it is possible put the power adjustment ring in a bind.

    In fact, it's possible to literally deform the scope tube by torquing the scope rings down too tight.

    I've had the power adjustment ring on my 3-18 IOR 35mm tubed scope start to tighten up on me when tightening down the rear scope ring more than necessary. And this is one beefy scope tube. When I loosened that scope ring back up, the power adjustment ring then again turned much more easily. Deform the scope tube in that area and the bind on the power ring is potentially permanent.

    My suggestion - try loosening up the rear scope ring and see if the power adjustment ring turns easier.
    Last edited: Apr 16, 2009

  3. MAX100

    MAX100 Member

    Feb 21, 2009
    I have a new one that has never been mounted and the power adjustment is hard to turn. I think it is because of the tight rubber seal. I have been working it back and forth and it has loosened it up a lot.