![]() There is a sticky on the scope forum here for setting up your diopter appropriately (and I have seen that recommendation in manufacturer's manuals as well - yes, I often do read through those manuals even though I'm a guy ) however, I have had issues with this at times in that my eyes seem to tell my brain that the reticle is in focus through a broad range of the dioptric adjustment. Because FFP scopes are more finicky than SFP scopes in regard to reticle sharpness it is especially important to setup the diopter appropriately. lower magnification (8x vs 4x).ĭiopter - The idea behind the diopter is to get the reticle to be in focus when you are looking through the scope. So my question is this, why are some scope designs more forgiving when it comes to parallax adjustment and do higher magnification erector assemblies tend to have more of an issue vs. I have experienced that my parallax on my AMG is much more forgiving and in fact, if I recall correctly, when Frank reviewed the AMG he mentioned that he shot a competition with it where he left it on one setting and shot both short range and long range targets the rest of the day without having to adjust parallax. While I really like March scopes, they do tend to have finicky parallax and you have to be a little more precise with your adjustments with the 3-24x series. Maybe you can touch on a couple other subjects that tend to come up related to parallax and focus:įorgiving parallax - the situation where some scopes make it very difficult to get precise parallax correction whereas other scopes are parallax free throughout a pretty broad range. ![]() Thank you ILya for that informative presentation. This gets tricky again because of how our brains process images. If you DO see parallax error, but target is sharp and reticle is sharp = I don't know (again, I don't see how that is possible). We are really good in seeing sharp edges where there are none. This a situation where the reticle plane is not quite in the right spot with respect to the erector optical system and your eye and brain make the reticle look sharper than it really is. If you see no parallax error, but the target is blurry and reticle is sharp = diopter set incorrectly (but I don't see how that's possible as you would have parallax error). I do not see how you can have no parallax error with a blurry reticle unless there are major ophthalmic issues. If you see no parallax error, but the target is sharp and reticle is blurry = diopter set incorrectly (but I don't see how that's possible as you would have parallax error). If you see no parallax error, and target is sharp and reticle is sharp = everything good. ![]() That means either the diopter is set incorrectly or the parallax control is set incorrectly or there is a malfunction in the system somewhere. If either the target or the reticle are blurry, then they are-by definition-not on the same plane of focus. It brings one focal plane in line with another. That is how the parallax control removes parallax error. It is physically impossible for two images to be on the same focal plane, yet one is out of focus and the other is not.
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