User manual ORION TELESCOPES & BINOCULARS FINDER SCOPES

[. . . ] Unthread the black nylon alignment screws on the bracket until the screw ends are flush with the inside diameter of the bracket. Slide the eyepiece end (narrow end) of the finder scope into the end of the bracket's cylinder opposite the alignment screws while pulling the chrome, spring-loaded tensioner on the bracket with your fingers (see Figure 3). Push the finder scope through the bracket until the O-ring seats just inside the front opening. Release the tensioner and tighten the two black nylon screws a couple of turns each to secure the finder scope in place. [. . . ] The finder IN 184 Rev A 03/02 scope and the main telescope must be aligned so they point to exactly the same spot in the sky. Alignment is easiest to do in daylight hours. First, insert an eyepiece into the main telescope and point the telescope at an object such as the top of a telephone pole or a street sign that is at least a quarter-mile away. Move the telescope so the target object appears in the very center of the field of view when you look into the eyepiece. Is the object centered in the finder scope's field of view, i. e. , on the crosshairs?If not, hopefully it will be visible somewhere in the field of view, so that only fine adjustment of the finder scope's black nylon alignment screws will be needed to center it on the crosshairs. Otherwise you'll have to make coarser adjustments to the black nylon alignment screws to redirect the aim of the finder scope. Note that the image seen through the finder scope appears upside down if it is not a correct-image finder scope (see Figure 2). Once the target object is centered on the crosshairs of the finder scope, look again in the telescope's eyepiece and see if it is still centered there as well. If it isn't, repeat the entire process, making sure not to move the telescope while adjusting the alignment of the finder scope. When the target object is centered on the crosshairs of the finder scope and in the telescope's eyepiece, the finder scope is aligned and ready to be used for an observing session. The finder scope and bracket can be removed from the dovetail mounting base for storage, and then reinstalled without significantly changing the finder scope's alignment. The finder scope alignment should be checked before every observing session. This can easily be done at night, before viewing through the telescope. Choose any bright star or planet, center the object in the telescope eyepiece, and then adjust the finder scope's alignment screws until the star or planet is also centered on the finder's crosshairs. Focusing the Finder Scope If, when looking through the finder scope, you notice that the images appear somewhat out of focus, you will need to refocus the finder scope for your eyes. First loosen the lock ring located behind the objective lens cell on the body of the finder scope (see Figure 1). Back the lock ring off by a few turns, for now. Refocus the finder scope on a distant object by threading the objective lens cell in or out of the finder scope body. Once the image appears sharp, retighten the lock ring behind the objective lens cell. The finder scope's focus should not need to be adjusted again. Adjusting the Finder Scope Crosshairs Should you feel the need to change the orientation of the finder scope's crosshairs, you can do so by carefully rotating the finder scope in its bracket. [. . . ] On larger lenses, clean only a small area at a time, using a fresh lens tissue on each area. Never reuse tissues. One-Year Limited Warranty This Orion Finder Scope is warranted against defects in materials or workmanship for a period of one year from the date of purchase. This warranty is for the benefit of the original retail purchaser only. During this warranty period Orion Telescopes & Binoculars will repair or replace, at Orion's option, any warranted instrument that proves to be defective, provided it is returned postage paid to: Orion Warranty Repair, 89 Hangar Way, Watsonville, CA 95076. [. . . ]