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adjustable objective

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rain252 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rain252 Quote  Post ReplyReply Direct Link To This Post Topic: adjustable objective
    Posted: March/14/2007 at 17:49
Is there an advantage to having adjustable objective on a variable scope as compared to not having it?    I noticed the ones with AO seem to cost a little more.
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RifleDude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 18:42

It depends on what the scope is used for and how much magnification is on the upper end.  For big game hunting at typical big game shooting distances, you don't need A/O.  If the scope tops out at above 10X or so and you're shooting at small varmints or target shooting, AO will eliminate parallax problems.

Ted


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Post Options Post Options   Thanks (0) Thanks(0)   Quote cbarc Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 18:50
The adjustable objective is used to focus more precisely on the target. It will help eliminate parallax, which is the apparent shift of the target against the reticle caused by a change in observer position.  This is a very good feature to have for longer range shooting.  Most lower magnifaction scopes (3-9x) without AO are factory set at 100 yds.
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Dale Clifford View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dale Clifford Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 19:16

AO's are not created equal, some hardly work, ---  The thread pitch in the AO determines how much crank it takes to make it work, on most, the difference between infinity and 300 yds is hardly noticable, Since most long range shooting is at the infinity setting, an AO's greatest advantage is a short to intermediate range.

An AO on a variable  is of little use until you get into the higher powers of the variable. Higher mag. fixed powers make the most use of the AO.



Edited by Dale Clifford
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rain252 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rain252 Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 19:22

Thinking about buying this Nikon scope at SWFA:

Nikon 3.3-10x44 Monarch UCC Riflescope

I want to be able to shoot from 25 to 200 yds.....maybe 300 if possible.....would that be a good choice?

I want a varaible.  This will go on an AR-15. That is the one with mild-dot and matte finish.  



Edited by rain252
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RifleDude Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 19:33
Yes, that would be a good choice at a good price, and although you wouldn't need A/O for that application and that magnification range, it won't hurt to have it.
Ted


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rain252 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rain252 Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2007 at 19:38

I appreciate the input and comments......I am learning.

I ordered it on SWFA. The order went through and didnt say anythng about being sold out, so maybe they have it in stock.



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