Sirius Optics from Amazon.com

The pinnacle of Celestron's ED scopes, Celestron 80ED Refractor... more

The pinnacle of Celestron's ED scopes, Celestron 80ED Refractor Spotting Scope is packed with great features and excellent optics. The refractor style 80-ED (APO) features a 2" rack less

1 rating

1st rating
Michael Y.

Optical Design: Refractor, Focal Length: 900 mm

To capture dramatic celestial portraits with a film or digital ... more

To capture dramatic celestial portraits with a film or digital SLR or an astronomical CCD camera, you'll need a solid mount with excellent tracking and guiding capability and, ideally, a telescope with a large aperture and a focal ratio of f/6 or less. The Sirius 8 EQ-G reflector fills the bill nicely. With the computerized Go-To system, pushing a button or two is all it takes to swing the optical system automatically. Dual internal stepper motors then move the telescope at up to 3.4-deg per ... less

To capture dramatic celestial portraits with a film or digital ... more

To capture dramatic celestial portraits with a film or digital SLR or an astronomical CCD camera, you'll need a solid mount with excellent tracking and guiding capability and, ideally, a telescope with a large aperture and a focal ratio of f/6 or less. The Sirius 8 EQ-G reflector fills the bill nicely. Dual internal stepper motors move the telescope at up to 3.4-deg per second right to your target object, tracking it while you observe or photograph it. With the standard dual-axis controller, ... less

Here is a "more perfect union" of great optics and state-of-the... more

Here is a "more perfect union" of great optics and state-of-the-ar­t mount than has ever been offered for such an attractive price. These powerful, large-aperture telescopes provide the optical performance, stability, and versatility for visual or imaging applications, and computerized navigation to ensure a rewarding experience under the stars. For the novice seeking a "keeper�­34; scope to the enthusiast looking to upgrade, a Sirius Schmidt-Cassegr­ain is hard to beat. The 9.25" Schmidt-Cassegr­ai... less

For the most demanding enthusiast, our 180mm Mak sets a new sta... more

For the most demanding enthusiast, our 180mm Mak sets a new standard for superb high-power performance in a remarkably compact design. The 180mm (7.1") Maksutov-Casseg­rain optical system has 2,700mm focal length (f/15). With 44% greater light grasp than a 150mm Mak, you'll get brighter images and better resolution. Dual internal stepper motors then move the telescope at up to 3.4-deg per second right to your target object, tracking it while you observe or photograph it. With the standard dual... less

Here is a "more perfect union" of great optics and state-of-the... more

Here is a "more perfect union" of great optics and state-of-the-ar­t mount than has ever been offered for such an attractive price. These powerful, large-aperture telescopes provide the optical performance, stability, and versatility for visual or imaging applications, and computerized navigation to ensure a rewarding experience under the stars. For the novice seeking a "keeper�­34; scope to the enthusiast looking to upgrade, a Sirius Schmidt-Cassegr­ain is hard to beat. The 8" Schmidt-Cassegr­ain o... less

Here is a "more perfect union" of great optics and state-of-the... more

Here is a "more perfect union" of great optics and state-of-the-ar­t mount than has ever been offered for such an attractive price. These powerful, large-aperture telescopes provide the optical performance, stability, and versatility for visual or imaging applications, and computerized navigation to ensure a rewarding experience under the stars. For the novice seeking a "keeper�­34; scope to the enthusiast looking to upgrade, a Sirius Schmidt-Cassegr­ain is hard to beat. The 9.25" Schmidt-Cassegr­ai... less

Here is a "more perfect union" of great optics and state-of-the... more

Here is a "more perfect union" of great optics and state-of-the-ar­t mount than has ever been offered for such an attractive price. These powerful, large-aperture telescopes provide the optical performance, stability, and versatility for visual or imaging applications, and computerized navigation to ensure a rewarding experience under the stars. For the novice seeking a "keeper�­34; scope to the enthusiast looking to upgrade, a Sirius Schmidt-Cassegr­ain is hard to beat. The 8" Schmidt-Cassegr­ain o... less

For the most demanding enthusiast, our 180mm Mak sets a new sta... more

For the most demanding enthusiast, our 180mm Mak sets a new standard for superb high-power performance in a remarkably compact design. The 180mm (7.1") Maksutov-Casseg­rain optical system has 2,700mm focal length (f/15). With 44% greater light grasp than a 150mm Mak, you'll get brighter images and better resolution. With the GoTo controller, you can command the telescope to swing to any of 13,400+ celestial objects. Dual internal stepper motors then move the telescope at up to 3.4-deg per seco... less