A gear is in contact to said cam tube and is positioned so as to rotate said cam tube when said gear is rotated.
Finally, an actuator is positioned on a side of said scope and operatively connected to said gear so that said actuator causes said gear to turn when a user moves said actuator., wherein said actuator has a range of movement that permits said actuator to operatively rotate said cam tube by more than a complete rotation and said cam tube irregular helical slots extend for greater than a full rotation around said cam tube., wherein said scope further has an ocular portion having a housing and said actuator is a knob on the right hand side of said ocular portion housing, from the perspective of a shooter using said scope.
The objective lens group gathers in the light from the target and projects the target image as a magnified and inverted first intermediate image.
A guide sleeve attached to the lens mount slides in a straight slot in the body of the guide tube to maintain the orientation of the erector lens.
This same guide sleeve also engages an angled, or curving, slot in the cam tube.
Another disadvantage of the windage and elevation knob design, is the typical placement of the knobs in the center of the scope.
This limits the placement of a hunter's scope, which is held by a set of mounting rings.
The ocular lens group presents the second image to the eye for viewing.
In a typical scope, the erector lens group is part of an erector lens assembly, which includes a guide tube that carries the erector lenses.Turning the cam tube causes the erector lens mount to move along a portion of the length of the guide tube, varying the magnification.Each erector lens or lens group has its own slot in the cam tube, with the configuration of these slots determining the amount and rate of magnification change as the cam tube is turned.This invention relates to variable power sighting scopes, and in particular to a scope that provides magnification zoom ratios greater than are currently feasible.A rifle scope serves to magnify the target and overlay a visual aiming point, the reticle, on the target.upside down and flipped horizontally) to a viewer, so that the image will appear “erect” or upright to the viewer.