Adjustable Objective


Firearm & Gun Forum - FireArmsTalk.com > Gear & Accessories > Optics & Mounts > Adjustable Objective

Reply
 
LinkBack Thread Tools Display Modes
Old 04-06-2012, 05:56 PM   #1
Feedback Score: 0 reviews
 
Join Date: Feb 2012
Posts: 11
Default Adjustable Objective

Can someone tell me how to use an adjustable Objective on a scope meaning when do u turn it ? say if im shooting at 200yds do I move the dial to the 200 position on the scope??? and what dose it do for u???



__________________
upssmann is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 04-06-2012, 08:56 PM   #2
Feedback Score: 0 reviews
 
Join Date: Sep 2011
Location: Molon Labe,Missouri
Posts: 554
Liked 79 Times on 65 Posts
Likes Given: 40

Default

That's exactly what you would do, but you'll find that with some fine twisting and turning each way, you might find that the A/O isn't lined up with the 200yd mark. This is because of each individual's eye changes and how well calibrated the scope is, and that is usually in the scope's cost---but not always, as even some of the cheapest scopes(which I have a few) out there may be on the mark, with some luck. Basically the A/O takes out blurred images and seeing more than 1 crosshair(parallax) from 20yds to infinity to help you see the target clearly for the yardage used and is only a helping tool, so if your scope's A/O markings are slightly off, don't fret it and just get a clear image before pulling the trigger. This helps you with knowing if your gun/rifle is able to take the shot by needing to use hold-over, or putting the crosshairs dead-on. The A/O also helps the shooter sight in their scope by giving some indication with it's clarity, just how far from a target they are, when you don't have a lazer yardage monoscope. I use A/O all the time when sighting in my scopes to make sure I'm at least on paper at 10yds and make some adjustments(if needed) then back up to 25yds(readjust A/O) take a couple shots, and if still good, then I'll back up 50 to 200yds depending on scope and rifle. Of course some of my scopes don't have A/O because they're parallaxed(closely) for a certain yardage of 50(more like 20 to 65yds),75(between 60 to 80), or 100yds(more like 85yds and beyond), so I use a lazer sighting device to give me actual yardages then work my gun to it's, and my capability. Some folks will use a 2-7x32 without A/O scope for hunting from 25yds to 150yds and not worry about parallax(I don't) because it'll still kill the animal, and surrounding hunting obstacles(trees/brush and no wide open spaces) prevent the usage of high powered scopes impractical, while other folks will use a 8-32x50 scope with A/O for target shooting at 25 to 100yds to see where their bullets are precisely hitting for competition, where just .002 of an inch means you're the winner or the loser of match. Also be aware that with (some) scopes that have A/O, or even power magnifications, the scope's POI(point of impact) could change, and this is usually associated with scope's cost, reliability, and where made. Any other questions, feel free to ask.
Del

__________________
Triumphman is offline  
 
Reply With Quote
Old 04-07-2012, 12:23 AM   #3
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
JonM's Avatar
 
Join Date: Nov 2009
Location: Rochester WI,Rochester WI
Posts: 18,105
Liked 6035 Times on 3164 Posts
Likes Given: 433

Default

parallax in scopes is the difference between the focal planes and the objective in a scope. an adjustable objective allows the shooter to set the image so that the xhairs line up with observed object in the same alignment.

here is a better explanation of the various types of parallax: http://en.wikipedia.org/wiki/Parallax

__________________

"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith

The problem with being stupid is you cannot simply decide to stop doing dumb things...

JonM is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Adjustable sights for SA Birddogyz 1911 Forum 5 01-23-2012 10:00 PM
RSA Adjustable Trigger for my SAR 3 5.56 AK ARnoob AK & SKS Discussion 5 12-15-2010 02:36 PM
Adjustable Trigger Kits AK-47 AK & SKS Discussion 6 04-11-2010 03:46 AM
Adjustable Buttstock DeadEyeMoose3 AR-15 Discussion 1 03-20-2010 08:32 PM
Adjustable sights jmontie XD Forum 9 10-06-2009 02:41 AM