These two tables show why I say that for a casual shooter or small game hunter, there's no reason to worry about parallax. These two tables show maximum parallax error for a scope with a 40mm objective. The first one is a "big game" scope with a parallax set at 150 yards. The second one is a "rimfire" scope set at 50 yards. You have to get really out of shape in cheek weld and sight alignment to induce maximum error, so in reality, you are likely only dealing with 1/2 the values shown. Remind me again why a hunter needs a "rimfire" or AO scope?