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AO Vs not

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Category: Scopes
Forum Name: Rifle Scopes
Forum Description: Centerfire long gun scopes
URL: http://www.opticstalk.com/forum_posts.asp?TID=9082
Printed Date: November/22/2017 at 14:30


Topic: AO Vs not
Posted By: jackG
Subject: AO Vs not
Date Posted: December/21/2007 at 20:56
While hunting in MT this fall, my hunting partner emphatically stated that there is no way a scope lacking AO could produce as sharp an image as one equipped with AO.  I have noted that on many scopes, as the power ramps up, AO begins to appear on the list of features.  
 
I understand parallax and it can be demonstrated by using some simple exercises.   I'm pretty sure I don't understand how a scope can be optically focused to infinity.   I think I suspect that my hunting partner's assertion may be technically correct.  However,when I'm shooting at deer, pronghorn and elk sized targets, the deficiency created by no AO may not be great enough to matter or even be seen.   Can someone answer that question?
 
I currently use a 3-9X42 and I'm looking for a higher powered scope,    But,  I don't think I want to be screwing around with an AO when a herd of pronghorn are all staring right at me, as only they can, and revving their engines.  There's just no time for it.  I'm looking at the Kahles AH or KX in perhaps 3-12 and don't want the AO.    I looked at some of the mid-range scopes, Nikon and Bushness, and scopes in that power range appeared to like AO.  



Replies:
Posted By: pyro6999
Date Posted: December/21/2007 at 21:04
kahles is a great choice they make an awesome scope if i could afford one i would have one myself check the samplelist out here for sure!

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They call me "Boots"
375H&H Mag: Yeah, it kills stuff "extra dead"

343 we will never forget

God Bless Chris Ledoux
"good ride cowboy"


Posted By: Urimaginaryfrnd
Date Posted: December/21/2007 at 21:12
I dont think having the adjustable objective is a deal killer. I have a 4-16x40 Bushnell 4200 that I hunt with because I like to be able to evaluate the rack on the deer and often shoot at 200 yds + What I do is set it at 200 or whatever distance I expect to see something at  and at other distances it is certainly clear enough to be useable but can be fine tuned is time allows that luxury.  You will find that scopes with adjustable objectives are typically higher power scopes and if time allows to use a higher power like a 16x that will need a good solid rest then there is time enough to adjust the objective. With my Bushnell 4200 if I set the objective on 200 I certainly would not have a problem shooting a deer at 50yds or at 400 yds.   As for the Kahles they are awesome and I would love to have a Multizero Kahles
8271 Kahles 3-12x56 CS Multizero http://www.samplelist.com/picture_form.aspx?pic_url=8271_Picture%20021.jpg"> 51835, Matte finish, plex reticle, 30mm tube, fast focus eye piece, allows you to zero your scope at five different ranges, close to new condition. $1,945.00 $999.95


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"Always do the right thing, just because it is the right thing to do".
Bobby Paul Doherty
Texas Ranger


Posted By: Dale Clifford
Date Posted: December/21/2007 at 21:32
If the antelope are looking at you -- its already too late, technically an ao will always give a better image, and it is related to the magnification, but in most hunting situations not necessary. ao's are more important from close to near than near to far, and work well the smaller the target or in shootin for groups. The pitch thread is important, some scopes have such narrow depth of field ranges one can leave them on 300 for everything, I use a 3.5x10 v3 for this reason, while other ao's will take up almost 270 deg. of a turn and are very exact.  a top quality scope such as z6 or the one you are considering will give more contrast and better resolution than a lesser scope with an ao.



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