THE GAME READY DIFFERENCE. Game ReadyÂ® was built upon the concept that the principles behind spacesuit. technology could be used to develop an injury treatment system. As a designer for. NASA and an inductee into the U.S. Space Foundationâs Hall of Fame, our founder.
No adjustment of the scope will eliminate these abnormalities or optical deficiencies. You can check the parallax of any scope by sighting an object at normal shooting distance (not indoors), by moving your eye side to side (then up and down), as far as you can, keeping the sighted object within the field of view. The apparent movement of the reticle in relation the target is parallax.
This also means the scope you're looking at is a variable scope, meaning you can change the magnification settings. Some scopes are fixed scopes -- you can't adjust the magnification setting. The number 42 refers to the size of the objective lens: 42 millimeters.