Astromania Laser Collimator for Newtonian Dobsonian Marca Telescopes, Telescope Alignment 1.25 Inch with 7 Red Laser Bright Levels, Great Telescope Accessories Laser Alignment Tool for Collimation

1.25" Next Generation Laser Collimator
 
-Newtonian reflectors perform at their best when primary and secondary mirrors are accurately aligned. Such alignment, called collimation, is critical for achieving a sharp, highly resolved view through the telescope.
 
-The Laser Collimator, designed specifically for collimating the optics of Newtonian reflectors, provides a quick, easy way to a) determine if one or both of your telescope’s mirrors need adjustment, and b) make the necessary adjustment(s) quickly and easily.
 
-It uses a low wattage laser to project a red beam down through the telescope’s focuser. The beam reflects off the secondary mirror to the primary mirror, then bounces back up to the secondary mirror and exits through the focuser onto the angled, bulls-eye viewing screen of the collimator itself. The beam is generally not visible, but you’ll see a bright red dot on each reflected surface. The Laser Collimator works equally well to collimate telescope optics in daylight or at night in the dark, and has been precisely aligned within its housing at the factory.

 
 

Installing Battery: The Laser Collimator is powered by one CR2032 battery (Not Included). When the laser beam starts to dim or completely fades, it’s time to replace the battery. To do so, unscrew the knurled battery compartment cap at the top of the collimator. With a knife tip or the end of a paper clip, lift the edge of the expired battery out. Insert a fresh CR2032 battery with the positive (+) side up. Then replace the cap. The CR2032 is a commonly used battery in watches, calculators, cameras, and other electronic devices, so you’ll be able to find one at most drug/hardware stores or online.		Care and Maintenance: Your Laser Collimator is manufactured of the highest quality components. The internal laser diode is precision aligned with the mechanical axis of the housing at the factory and tested to meet stringent specifications. Like all electronic equipment, the Laser Collimator should be handled with care. If it is dropped or handled roughly, the internal laser could become misaligned. Avoid exposing the collimator to water, dust, heat. To extend battery life, store the collimator in a cool, dry environment.		Dual Language Instruction This adjustment tool can be used in all 1.25" focusers. We provide you with precise instructions in German and English, with a step-by-step explanation of how to adjust a Newtonian telescope using this laser unit. So, even if you are a newcomer to amateur astronomy, it is very simple to get the optimum performance out of your telescope.		Recalibrating the Laser Collimator The Laser Collimator has been precisely aligned at the factory and can be used directly, unless a strong impact which require recalibration. You need a holder that is required is a suitable "V" block to rest the collimator body in so that it can be rotated through 360 degrees. To check the calibration, the laser should be rested in the jig aimed at a wall about 6 metres (20 ft) away and slowly rotated. If the laser dot on the wall describes a circle, then the collimator is out of calibration. There are three adjustable screws around the body of the unit (Please refer to the picture) and by loosening one and tightening another, it will be seen that the laser dot will move slightly. Only minute adjustments should be made and the screws should not be over-tightened or made too loose. What you are aiming for is a full rotation of the collimator in the jig resulting in NO movement of the laser dot on the far wall.