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How to use an AO scope?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/28/2004 at 20:41
Emil View Drop Down
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I recently got a Beeman R9 airgun package with a Bushnell Banner 4-12x AO scope.  I'm still trying to figure out how best to use the scope.

The Bushie focuses down to under 10yds, which is nice if the situation presents itself, but for the most part I'm plinking in the 20-40 yd range.

The focusing doesn't seem to be super fine, meaning that I can shoot within a certain range without adjusting the focus.  I haven't found that I can range find with the scope, but then again, I haven't tried that hard to use it for such.

So, is AO intended to be used for range finding?  Or is it intended more just to give an extended (shorter) focal range for rimfires and airguns?

How do you use your AO scope?  For plinking, it's no big deal if I have to adjust the scope a little, but I'm wondering about hunting situations that might present themselves at an instant from, say, 20 yards out to maybe 75 yards or more.



Edited by Emil
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/28/2004 at 21:05
redneckbmxer24 View Drop Down
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An A/O scope will ussually clear up the scope a little for close ranges, but it is put there to compensate for paralax. paralax is and optical illusion. And it occurs when you move your head side to side in the scope and the reticle moves and the cross hair moves to different places on the target without the gun itself moving.. and an A/O eliminates parralax at certain ranges.
 
cory
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 10:32
Knewt View Drop Down
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Perhaps Emil's confussion comes from a post I left earlier about field target scopes.... the scopes that are used as I discribed (i.e. finding range with a side parallex wheel)are a very special scope configuration. Their side parallex adjustment wheels are somewhere between 2"-3" in dia. and are calibrated down to the nearest 1/2 meter (or yard). They are also capable of "focusing" at under 10 meters..

The reason for their use in the sport of field target is that the targets (and especially the kill zones) vary in size , even within the same target type (rats, crows, rabbits,etc. in at least 3 different sizes with as many as 5 different kill zone sizes). So since it is "forbidden" to know the exact size of the target or the kill zone, it is impossible to accurately range a target using any sort of range finding reticle. And since any type of laser range finding device is not allowed, they range these small targets by finely focusing on them.

Concidering the extremely arcing trajectory of even a high power pellet rifle and the small kill zones (sometimes as small as 3/8") it is easy to see why a very accurate range estimation is so crucial in this game.... and left no other ranging options it is easy to see why the serious players in this sport have settled on the "fine focus" method of range estimating.... I need to stress again that this requires a VERY specialized scope... the likes of which are quite hard to find in this country and which even from an "economy class" scope manufacturer are VERY expensive. (the nikko-stirling version of this type of scope is over $800)
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 14:25
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Basically the AO focuses the cross hairs. While the European style focus located at your eye focuses the image.

There are numbers located on the AO that represent distance. If you wanted you could use these numbers to get a very ruff estimate of the distance. Once you have adjusted the AO enough where the cross hairs are very crisp. Look on the AO and determine where your mark on the scope is lined up with a certain number. Other then this way the AO is not really described as a range finding feature.

With extreme magnification the AO can be used a range finding feature. Extreme being 40X plus. Kinda like the old Tasco custom shops... 8-40X56. Too bad those aren't around anymore those sold like hot cakes.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 14:44
Emil View Drop Down
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Thanks all.

So, what's the recommended procedure for someone with a lower powered scope who's not rangefinding?  For my use on an airgun, from maybe 15 to a max of 50 yards, should it be a set once and forget it type of thing, or does adjusting it at the range extremes make a big difference in accuracey?

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 15:03
redneckbmxer24 View Drop Down
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as long as you dont have a problem with a little blurr, i wouldnt worry about it. i leave my A/O scopes at 100 inless i step down below 50, or go over 500. and as far as in your condition, im not expert in airguns, but i would jsut set it at 40, and leave it alone, but thats just me, and it depends just how blurry it gets. i dont think its going to have a huge impact on accuracy either way.

 

cory

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 15:17
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Go ahead and turn the AO whenever you fell it is necessary. If your crosshair is blurred then use the feature the scope offerers. The AO would be pointless if it wasn't used when it was intended. It wont effect the accuracy by turning the AO. That has to do with the scopes adjustments. Since you are shooting an air gun your going to want crisp cross hairs. So don't be afraid to crank that puppy to get the full performance out of your scope. The AO can only benefit you.........
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 17:39
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Here is a link to a related topic.

What is parallax anyway?

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: July/29/2004 at 23:47
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Chris....
Thanks for that post.... As I was reading one of the earlier posts I suddenly got this sinking feeling that the way I have been setting up my scopes for all these years was somehow backwards.... but the article from Paul Colburn, when read carefully, gave me a huge sigh of relief.... comming from a family very involved in the shooting sports I was asking myself " was I misinformed originally or did I somehow get it twisted around in my mind since then" .... Thankfully it was neither.
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