If you'll read the whole thread where Roe Deer and I went back and forth, you'll find where even RD eventually 'got it,' especially when we started talking about wire reticles, which do have physical dimensions apparently ignored in the formula presented. This is exactly why I don't post very often on optics here anymore. I tend to think that the effects that you are seeing are more to do with your own eyes being able to vary some portion of a diopter rather than an effect contrary to optical facts.DJ I realize that you put a lot of faith in that you've seen what you have seen but I find it difficult to accept something that professional opticions claim is impossible (or with in 17/1000 of 1% possible). 45 years plus, who's eyes lack juvenile adaptabily). In addition, in this example, the image m AND m is blurry - as well as the reticle (at least with persons of ca. It is impossible to 'see' such a tiny improvement in parallax of 0,0173� with (y)our naked eye. Changing diopters via ocular to 'minus 2 diopters' changes the 'inner distance' of optical elements so that parallax is not as much as w' = 0,1153� - but w' = 0,098� only Looking at an image m only, the parallax is offģ. Perhaps an AO scope for this use ? EĪn Euro Chief Optical Engineer made up a calculation as follows:ġ. if my own expereince with this issue is any guide. for a parallax free setting may well have some significant parallax at 100 yds. But that is still quite different from 50 yds. For instance, using a small Burris scope, Barsness said he found he could get at least a little of the parallax out of that scope at 75 yds. If it were mine, I'd first decide just where I wanted it to be parallax free. So, I concluded, the use of the ocular on those scopes to reduce that parallax simply wasn't practical. By the time I got the image any where near focused, and the image must be sharp to reduce the apparent parallax, the reticle was way out of focus. Just for fun, I've tried focusing my 6X42's at 40 yds. That means there is a big difference in parallax there vs. Enough to effect my group sizes in a very good way. I've used the ocular to get some parallax out on my big game scopes at 100 and 300 yds.

If you are talking about the ocular, or the eye piece, I'm not sure if you can get that much parallx out of the scope by using that. If you are talking about the objective of that scope, I have no idea.

Parallax adjustment