Popular Articles

How to Determine Which Eyepieces to Use with Your Telescope
SCT & EdgeHD Collimation Guide
Aligning Your Celestron Finderscope: A Step-by-Step Guide
Why is my Telescope Showing Everything Upside Down? Is There Something Wrong with it?
Which scope aperture is best for different kinds of objects?
What are the major types of optical microscopes?

What are the major types of optical microscopes?

The most common types of microscopes are classified according to the type of view they provide. A high-power or compound microscope can provide a highly magnified view of a cell,...

What are the major types of optical microscopes?

The most common types of microscopes are classified according to the type of view they provide. A high-power or compound microscope can provide a highly magnified view of a cell,...

What do I need to know about spotting scope zoom eyepieces?

Zoom eyepieces are a great convenience, since you don’t have to change eyepieces to closely examine a distant view or pull back for a wide angle scene. However, there are...

What do I need to know about spotting scope zoom eyepieces?

Zoom eyepieces are a great convenience, since you don’t have to change eyepieces to closely examine a distant view or pull back for a wide angle scene. However, there are...

What are lens shades and dew shields? Why do I need one?

Using your spotting scope in bright lighting conditions may result in a view that has glare or flares from sources of light in the direction you’re looking.A lens shade acts...

What are lens shades and dew shields? Why do I need one?

Using your spotting scope in bright lighting conditions may result in a view that has glare or flares from sources of light in the direction you’re looking.A lens shade acts...

Can I get my Mac to display images from my #44300 HDM?

For the older model #44300, the drivers aren’t on the CD that comes with the scope. Instead, go to the Celestron website and download the Mac drivers. They will work...

Can I get my Mac to display images from my #44300 HDM?

For the older model #44300, the drivers aren’t on the CD that comes with the scope. Instead, go to the Celestron website and download the Mac drivers. They will work...

What does ED stand for on my Sport Optics' scopes?

 ED means "extra-low dispersion" and refers to the composition and optical properties of the glass used for the lenses. ED glass is specially formulated, including rare-earth compounds to...

What does ED stand for on my Sport Optics' scopes?

 ED means "extra-low dispersion" and refers to the composition and optical properties of the glass used for the lenses. ED glass is specially formulated, including rare-earth compounds to greatly r...

How do I use my spotting scope for photography/digiscoping?

Your spotting scope doubles as a telephoto lens and can be used in several ways to take photographs of terrestrial and even celestial objects.Celestron’s Ultima spotting scopes have a T-adapter...

How do I use my spotting scope for photography/digiscoping?

Your spotting scope doubles as a telephoto lens and can be used in several ways to take photographs of terrestrial and even celestial objects.Celestron’s Ultima spotting scopes have a T-adapter...