Benefits of a Bigger Aperture

The job of a telescope is to gather light and bring that light to the eyepiece or camera. The larger the telescope's aperture, the more light the telescope can gather...

Benefits of a Bigger Aperture

The job of a telescope is to gather light and bring that light to the eyepiece or camera. The larger the telescope's aperture, the more light the telescope can gather...

Why don't the images I see through my telescope look the same as photos ...

The reason photos look better than what you see with the unaided eye is due to the camera’s ability to store light continuously as long as the shutter is open....

Why don't the images I see through my telescope look the same as photos ...

The reason photos look better than what you see with the unaided eye is due to the camera’s ability to store light continuously as long as the shutter is open....

What are the differences between the optical coatings?

UncoatedCoatedFully coatedMulti-coatedFully Multi-coatedFully Broadband Multi-Coated Fully Multi-Coated XLT CoatingStarBright XLTGlass without any coatingsAt least one of the major optical elements...

What are the differences between the optical coatings?

UncoatedCoatedFully coatedMulti-coatedFully Multi-coatedFully Broadband Multi-Coated Fully Multi-Coated XLT CoatingStarBright XLTGlass without any coatingsAt least one of the major optical elements...

I'm having trouble focusing my NexStar SE telescope

Your NexStar SE has a focusing knob on the back of the tube assembly. Unlike a refractor or reflector, the SE scopes achieve focus by moving the primary mirror forwards...

I'm having trouble focusing my NexStar SE telescope

Your NexStar SE has a focusing knob on the back of the tube assembly. Unlike a refractor or reflector, the SE scopes achieve focus by moving the primary mirror forwards...

What do aplanatic optics do?

Aplanatic optics are designed to eliminate both spherical aberration and coma, two major aberrations (image defects) found in telescopes. The end result is sharper images across a much wider field...

What do aplanatic optics do?

Aplanatic optics are designed to eliminate both spherical aberration and coma, two major aberrations (image defects) found in telescopes. The end result is sharper images across a much wider field...

My EdgeHD optical tube assembly (OTA) has four small tapped holes along ...

All EdgeHD OTAs have Fastar-compatible secondary cells. Because Fastar (and the third party system, HyperStar) is very sensitive to centering of the lens optics relative to the primary mirror, all...

My EdgeHD optical tube assembly (OTA) has four small tapped holes along ...

All EdgeHD OTAs have Fastar-compatible secondary cells. Because Fastar (and the third party system, HyperStar) is very sensitive to centering of the lens optics relative to the primary mirror, all...