Quote:
|
Originally Posted by Bart B.
None of the dictionaries listing "parallax" state it's limited to optics and lenses.
|
Parallax is a phenomenon present whenever a viewer watches two objects at different distances and changes his position. Every child who looked out a car window at plowed fields has seen it.
While the phenomenon is present in many situations, it is a parallax
error only where an optic designed to present a target and crosshair on the same plane fails to actually present them on the same plane.
Misalignment of iron sights doesn't give rise to this error because those systems don't present a viewer with target, front post and rear aperture on a single plane, ever. Therefore, that misalignment is not a parallax error.
You are absolutely correct that an alignment error will cause a round to land at a different spot relative to the front post, but since it doesn't occur where the sight picture is correct, the error isn't the result of parallax.