Optics

A Dobsonian telescope is a Newtonian reflector type of telescope and is made up of an alt-azimuth mount and Sonotube. A Dobsonian telescope is a low-cost telescope that is designed to view deep...

There are two main types of telescopes: refractor telescopes and reflector telescopes. Refractor telescopes work by using a glass lens, while reflector telescopes use several mirrors. In spite...

What qualities to look for in a telescope eyepiece and what to avoid. Learn more tips for buying a telescope this free home astronomy equipment video from a telescope designer and manufacturer.

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...

Most serious microscope hobbyists would love to use their digital cameras to take pictures of the up-close views they get. Taking pictures of microscope images is also useful for students and...

Whether you're using it for school, work or a hobby, a microscope is a significant investment. It is important to find a microscope that will deliver exceptional performance, be easy to use and...

An extension tube for a telescope or other optic acts between the objective lens and the eyepiece of the instrument by spacing and funneling light. Extension tubes affect focus capability by...

Once you've mastered telescopic object magnification, it's time to increase the brightness and detail of what you're viewing. Use a telescope filter to increase contrast anytime or reduce glare...

The automatic tracking feature on the Meade DS-2000 telescope lets you keep any object you sight centered in the eyepiece. Follow the steps below to set up Autostar in the Meade DS-2000.

The Meade 8î LX90GPS Schmidt-Cassegrain Telescope comes with a lot of exciting features, below you will find out how to align the SmartFinder on your telescope.

The Sky-Watcher SKMAK102SP Maksutov-Cassegrain Spotting Scope is a portable and powerful telescope. Know that it has a focal length of 1300mm for getting a sharper image of the object you view....

You determine the magnification power of a telescope from the focal length of the eyepiece and the focal length of the telescope. The eyepiece in the Sky-Watcher SK MAK series is either 10 mm or...

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

The ATN Night Patriot Night Vision Monocular is a multipurpose device that you can use with a weapon kit. Here’s how.

The eyepiece is the part of the telescope that you look into when viewing objects. It is located at the back of the optic lens and is usually bent 90 degrees up for easy viewing. Here's how to...

The area in which you can see through your telescope is known as the true field of view. Your telescope’s field of view is determined by the design of the eyepiece. Here is how to find the field...

The Barlow Lens, named after Peter Barlow, professor of mathematics at the Royal Military Academy of Woolwich, is a device that enhances the focal length of the Sky-Watcher telescope. The main...

To get the most out of your Meade 8-inch Lightbride Truss-Tube Dobsonian telescope, you'll need to insert and adjust the focus of the eyepiece. The telescope will provide years of entertainment...

To get the most out of your Meade 8-inch Lightbride Truss-Tube Dobsonian telescope, you'll need to insert and adjust the focus of the eyepiece. The telescope will provide years of entertainment...

The refractor models of the 90 Degree Diagonal Prism hold the eyepiece of your Meade DS-2000 upright for easy viewing. Looking through that kind of prism means you can see images upright but...

Autostar's automatic tracking can locate a star, then keep it centered in your telescope's eyepiece.

The eyepiece is the part of the telescope that you look into when viewing objects. It is located at the back of the optic lens and is usually bent 90 degrees up for easy viewing.

Since the Earth continually rotates, any objects you view through your Meade telescope will appear to move. Your telescope should automatically track objects so that you don't have to constantly...

Since the Earth continuously rotates, any objects you view through your Meade telescope will appear to slowly move. Automatically tracking these objects will keep them centered in your eyepiece so...

Attaching the viewfinder to your Meade 75 is part of the assembly process. You will be able to take this step in stride if you are patient and see the process through to its end.

The Sky-Watcher SK909AZ3 refractor telescope is an ideal choice for those who take sky watching seriously. The telescope has a multi-coated achromatic objective lens, aluminum tube and is equipped...

A telescope must be focused accurately to view an object properly. An out-of-focus telescope will show blurs or nothing at all. The first time you use a new telescope, it will most likely be out...

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....

The Barlow Lens, named after Peter Barlow (1776-1862), a professor of mathematics at the Royal Military Academy at Woolwich, England, is an additional device that enhances the focal length of a...

To use the Sky-Watcher SK707AZ2 Refractor Telescope with a camera, you need a camera adapter tube. It can work as a high magnification lens for your telescope. Attaching a camera adapter tube to a...

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 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...

A Barlow lens is a negative lens that is used to enhance the focal length of the Sky-Watcher SK705AZ3 Short Tube Refractor Telescope. Greater focal length reduces the area and ensures higher...

Telescopes allow you to get a better view of objects in the sky. You need to properly focus to get a sharp image of the object under view. Focusing a Sky-Watcher SK705AZ3 Refractor Telescope can...

The Sky-Watcher SK705AZ3 Short Tube Refractor Telescope receives light through the objective lens. It is the closest lens to the object being viewed from the telescope. It sends the image to the...

There are several versions of Night Storm Night Vision Monocular offered by ATN. Refer to your user manual for specific concerns pertaining to your version. You will need to clean the eyepiece of...

An eyepiece is the final lens attached to the telescope. The eyepiece collects light and brings it in focal point, which helps create an image. It is named so because it is closest to the eye when...

An eyepiece is a lens attached to the telescope that is closest to the eye when looking through the device. The eyepiece gathers light and brings it into focus, which helps create an image. It...

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...

Every telescope has an eyepiece that allows you to view and focus on objects. In the case of refractor telescopes, including the Sky-Watcher SK1206AZ3 Short Tube Refractor Telescope, a diagonal is...

You can use Autostar to automatically align your viewing objects. It's easy, saves time and leaves you free to do what you enjoy--stargazing! Here's how it works.

Use the setting circles for right ascension and declination on your Celestron Firstscope to quickly locate heavenly objects. You can find the objects' coordinates in star charts or atlases. Just...

It's easy to find objects in the sky using setting circles for right ascension and declination. You will find the objects' coordinates in star charts or atlases.

After installing the Star Pointer Finderscope to your Celestron telescope, you should attach the eyepiece. Follow these steps to easily complete this task.

Focusing your Meade NightView Digital Night-Vision Monocular requires practice, but it is a straightforward process. Here's how to master the procedure.

You can manually move your Meade LX90GPS Schmidt-Cassegrain telescope to gain a better view of distant objects such as birds and mountaintops. Just follow these steps.

Setting your telescope to automatically track objects as the Earth rotates will eliminate the need to constantly readjust your device. As the telescope automatically tracks an object, it will...

Observing objects with your telescope is a fascinating hobby for many. You will be able to see all sorts of objects you have only read about in books or seen in movies. By following these steps, a...

You can observe objects in the sky by aligning the viewfinder. You will be able to align your viewfinder by following these steps.

It is recommended that you perform steps 1 through 4 of this procedure during the daytime and step 5 at night.