Quick adjustment apparatus

1. An apparatus for use with a night vision device, the night vision device comprising a cylindrical focus knob, the apparatus comprising:

a rotating collar adapted to attach to the cylindrical focus knob, the rotating collar comprising:

a rotating collar housing comprising a rotating collar keyway adapted to accommodate a rotating collar attachment screw;

an adjustment lever extending perpendicularly away from the rotating collar housing;

a track;

a plurality of adjustment holes disposed at regular intervals on a side of the rotating collar opposite the track;

an adjustable stop comprising a spring-loaded ball adapted to releasably engage at least one of the plurality of adjustment holes, and a j-rail engaging the track, wherein a portion of the adjustable stop extends perpendicularly from the rotating collar in a direction parallel to the adjustment lever;

a static collar adapted to attach to a non-rotating portion of the night vision device adjacent to the cylindrical focus knob, the static collar comprising:

a static collar housing comprising a static collar keyway adapted to accommodate a static collar attachment screw;

a static stop extending perpendicularly away from the static collar housing,

wherein the static stop is oriented such that a distal end of the static stop is in proximity to the plurality of adjustment holes;

wherein a first focus setting is defined by contact between the adjustment lever and the static stop, and a second focus setting is defined by contact between the adjustment lever and the adjustable stop.

2. An apparatus for adjusting a focus knob of a night vision device between two predetermined focus settings, comprising:

a rotating collar adapted for installation on the focus knob comprising:

a rotating collar housing comprising a rotating collar keyway adapted to accommodate a rotating collar attachment screw;

a track disposed on a first side of the rotating collar;

a plurality of adjustment holes disposed circumferentially on a second side of the rotating collar; and

an adjustment lever extending perpendicularly from the second side; and

an adjustable stop, wherein the adjustable stop is adapted to releasably engage at least one of the plurality of adjustment holes, and slidably engage the track;

a static collar adapted for installation on a nonrotating portion of the night vision device adjacent to the focus knob, the static collar comprising:

a static collar housing comprising a static collar keyway adapted to accommodate a static collar attachment screw; and

a static stop extending perpendicularly from the static collar;

wherein the rotating collar and the static collar are installed proximate to each other, such that a distal end of the adjustment lever is proximate to the static collar, and a distal end of the static stop is proximate to the rotating collar; and

wherein a first focus setting is defined by contact between the adjustment lever and the static stop, and a second focus setting is defined by contact between the adjustable stop and the static stop.

3. An apparatus for rapid transition of an adjustment knob of a device between two predetermined positions, wherein the device has a nonrotating portion disposed adjacent to the adjustment knob, the apparatus comprising:

a rotating collar adapted to be attached to the adjustment knob comprising:

a rotating collar housing comprising a rotating collar keyway adapted to accommodate a rotating collar attachment screw;

a track disposed on a first side of the rotating collar;

a plurality of holes disposed on a second side of the rotating collar;

an adjustment lever extending perpendicularly away from the rotating collar in a first direction; and

an adjustable stop comprising:

a rail adapted to engage the track;

locking means adapted to engage one or more of the plurality of holes, whereas the locking means urges the rail into contact with the track;

a static collar attached to the nonrotating portion of the device, the static collar comprising a static stop extending away from the static collar parallel to the adjustment lever in a second direction;

and

wherein a distal end of the static stop is proximate to the rotating collar, and wherein a distal end of the adjustment lever and a distal end of the adjustable stop are proximate to the static collar;

wherein a first predetermined position is defined when the adjustment lever and the static stop are in contact, and a second predetermined position is defined when the adjustable stop and the static stop are in contact.