Optics

How to Calculate Sunset Time Using AutoStar on the Meade LX90GPS Schmidt-Cassegrain Telescope

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Calculating the sunset time will allow you to return to your telescope in time to view certain objects in the sky. Here's how to do it... more »

How to Calculate the Field of View of the Sky-Watcher SK1206AZ3 Short Tube Refractor Telescope

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Telescopes have varied eyepieces. A Sky-Watcher SK1206AZ3 Short Tube Refractor Telescope may incorporate different types of eyepieces. The eyepiece is a critical component of a telescope as it determines the telescopes field of view. In simple ... more »

How to Calculate the Field of View of the Sky-Watcher SK705AZ3 Short Tube Refractor Telescope

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The area that you can see through your telescope is known as the true field of view or the actual field of view. The field of view of your telescope is determined by the design of the eyepiece of the telescope. This basic information can help you ... more »

How to Calculate the Field of View of the Sky-Watcher SK909AZ3 Refractor Telescope

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The area that you can see through your telescope is known as the true or actual field of view. The field of view of your telescope is determined by the design of the eyepiece of the telescope. Calculating the field of view of a telescope can be ... more »

How to Calculate the Sunset Time With Autostar on Your Meade DSX-125C Altazimuth-Cassegrain Telescope

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Calculating the sunset time will allow you to return to your telescope at the right time to view certain objects in the sky... more »

How to Calculate the Sunset Time with Autostar on Your Meade DSX-90 Altazimuth-Cassegrain Telescope

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Calculating sunset time lets you return to your Meade DSX-90 Altazimuth-Cassegrain telescope at the appropriate time to view certain objects. Here's how to do it... more »

How to Calibrate Binoculars

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If anyone's ever handed you a pair of binoculars and said, "Look at that!" and you've held them to your eyes and have seen an unclear image, it's because you need to calibrate the binoculars for your eyes. So whether you're birdwatching or trying ... more »

How to Care for a Monocular

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A monocular is a low powered telescope similar to a binocular, only without two lenses or two eyepieces. Monoculars are great for hiking trips or bird watching trips when one doesn't want to deal with cumbersome binoculars. However, the care of a ... more »

How to Change the Direction of the Celestron FirstScope 114 Short Newtonian Equatorial Telescope

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Changing the direction of your telescope involves manipulating the declination and right ascension knobs. Follow these steps to complete the process... more »

How to Change the Eyepiece of the ATN Night Patriot Night Vision Monocular

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You can change the ATN Night Patriot Night Vision Monocular's eyepiece to alter the magnification. Here's how... more »

How to Change the Slew Speed of your Meade LX90GPS Schmidt-Cassegrain Telescope With Autostar

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Your Autostar computer controller slews your Meade LX90GPS telescope (that is, turns it on its axis) from one object to another or to center an object in the eyepiece. There are nine slew speeds available in Autostar, which are used for different ... more »

How to Change the Slew Speed on a Meade LX90GPS Schmidt-Cassegrain Telescope

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The Autostar controller has nine slew speeds that are directly proportional to the sidereal rate and have been calculated to accomplish specific functions... more »

How to Check the Collimation of the Optical System of Your Meade 12-inch Lightbridge Truss Tube Dobsonian Telescope

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The Meade 12-inch Lightbridge Truss Tube Dobsonian Telescope is a great sky-viewing instrument. But if your telescope is bumped or treated roughly, you will probably need to adjust the collimation or mirror alignment of the unit. Here's how... more »

How to Check the Collimation of the Optical System of Your Meade 8-inch Lightbridge Truss Tube Dobsonian Telescope

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The Meade 8-inch Lightbridge Truss Tube Dobsonian Telescope is a great sky-viewing instrument. But if your telescope is bumped or treated roughly, you will probably need to adjust the collimation or mirror alignment of the unit. Here's how... more »

How to Check the Collimation of the Optical System of Your Meade Lightbridge Truss Tube Dobsonian Telescope

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The Meade Lightbridge Truss Tube Dobsonian Telescope is a great sky-viewing instrument. If your telescope is bumped or treated roughly, you will probably need to adjust the collimation or mirror alignment of the unit. Here's how to check the ... more »

How to Choose a Lower MM Lens for the SmartFinder of Your Meade DS-2000 Series Reflecting Telescope

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A telescope’s eyepiece magnifies the light gathered by the optical tube. Each eyepiece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. For example, an eyepiece with a focal length ... more »

How to Choose a Telescope

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A telescope allows you to explore the skies and see well beyond the capacity of the human eye. The telescope has certainly come a long way from when Galileo first viewed the craters of the moon in 1609. Now, its possible for anyone to buy a ... more »

How to Choose Lenses for the SmartFinder of Your Meade DS-2000 Series Reflecting Telescope

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A telescope’s eyepiece magnifies the light gathered by the optical tube. Each eyepiece has a focal length, expressed in millimeters, or “mm.” The smaller the focal length, the higher the magnification. For example, an eyepiece with a focal length ... more »

How to Choose the Reticle Type on a Rifle Scope

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The reticle on a rifle scope is also known as the crosshairs. The reticle helps to line up the target that you're viewing through the scope. There are many different types of reticles, but most are a variation on the duplex reticle first ... more »

How to Clean Your Meade 12x50 Travel View Binoculars

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The Meade Travel View range was designed with the frequent traveler in mind. As such, it is an extremely lightweight and portable model, which allows you to carry it wherever you roam. Furthermore it retains all the quality of larger Meade ... more »

How to Connect Autostar to the Meade DSX-90 Altazimuth Maksutov-Cassegrain Telescope

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The computerized Autostar controller provides control of virtually every telescope operation. The backlit display, key arrangement and sequential database make Autostar extremely user friendly... more »

How to Connect Autostar to Your Meade DS-2000 Series Reflecting Telescope

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The Autostar Computer Controller provides control of virtually every telescope operation. Autostar has soft-touch keys designed to have a positive feel. The LCD (Liquid Crystal Display) is backlit with a red LED (Light Emitting Diode) for easy ... more »

How to Connect AutoStar to Your Meade DS-2000 Series Reflecting Telescope

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The Autostar Computer Controller provides control of virtually every telescope operation. Autostar has soft-touch keys designed to have a positive feel. The LCD (Liquid Crystal Display) is backlit with a red LED (Light Emitting Diode) for easy ... more »

How to Connect Autostar to Your Meade DSX-125C Altazimuth-Cassegrain Telescope

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Correctly attaching Autostar to your telescope will keep your device safe and running smoothly. Follow these steps to correctly install the device... more »

How to Create a Guided Tour with Your Meade 12-Inch LX90 GPS Schmidt-Cassegrain Telescope

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You can download guided tours of the night sky for your Meade LX90 GPS Schmidt-Cassegrain telescope from the Meade Web site (see link below). Or, if you are interested in creating your own guided tour, you can set your telescope to slew to a list ... more »

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