The stickey at the top of this section "setting up a new scope" explains it a little. After reading the stickey if you still have questions let us know.
Whether the scope is a variable power or a fixed power really has no bearing on whether is has an AO. And "Adjustable Objective" & "Adjustable Parallax" both accomplish the same thing. When you look through your scope you are not really seeing the target, you are seeing the image of the target projected on a plane inside the scope. The reticle (crosshairs) are also on a plane inside the scope. If the image & the reticle are not on the same plane you will have some parallax. (Which means the relationship of the target & reticle will change depending on where you place your eye behind the scope.) The AO allows you to move the image to the reticle plane & at the same time provides you with a better focused image. Most all "Deer Hunting" scopes are set to be parallax-free @ 100 yards or greater but most .22 shooting is done closer to 50 yards. If you are going to use a .22 for target shooting, and especially if you are going to be using a fairly high magnification scope be sure and choose one with the AO (or AP).....testman said:I'm confused about adjustable objective, variable magnification, and parallax settings. Do you need an AO to focus images on a variable magnification scope? Are "adjustable objective" and "adjustable parallax" the same thing?
You use the Ocular (eye piece) adjustment on any scope (AO or non-AO) to focus on the reticle (crosshairs). This is best done by pointing the scope at a clear blue sky. And just look through it for a very few seconds at a time. If you look long enough your eye will adapt. You want it focused so that the instant you look at it the reticle it is sharp & clear.testman said:Okay. I confused myself again.
How do you focus a scope that has a fixed parallax setting? Would you have to adjust the eye piece/reticule lens? Or are you not able to focus the target's image at all?
TOZ, I'm sure you are aware, but Testman may not be: The function of the AO goes way beyond just focusing on the target to get a clearer image. If there is parallax, unless you position your head in exactly the same place every time you look through the scope (& none of us can!), the relationship of the reticle to the target shifts. This can seriously effect your point of impact on the target.TheOpticZone said:With a fixed parallax setting, you get what you get. Your eye will need to do the focusing.