The Sirius achromatic refractor is already larger than the one used by Galileo Galilei many years gone past. Yet not only its magnification power is larger but also the quality of the optics used has increased by many times. Beginners will especially find the altazimuth mount beneficiary as it easily lets them move around the sky at night. The included astro software lets you compare what you see on your monitor with the night sky.

Optical Design

Achromatic refractor

Optical Coatings

MgF2 Coating

Front Lens Ø (Clear Aperture)

70mm

Standard Eyepiece(s)

H-20mm, H-12,5mm, SR-4mm

Focal Length, Focal Ratio

900mm, f/12,9

Telescope Shipping Weight (w/tripod)

3,1kg

Tube Body

Aluminum

Materials

lacquered, black

Telescope Mounting

Altazimuth Mount

Accepts Eyepiece Barrel Ø

1.25" (31.7mm)

Resolving Power in arc seconds

6

Limiting Visual Stellar Magnitude (approx.)

11,3mag

Recommended Maximum Visual Power

250x

Optical Tube Dimensions (Ø x length)

7,3cm x 91cm

View Finder Scope

5x24mm

Standard Accessories

Diagonal mirror, 2x Barlow lens, Astro software

Hemispheres of Operation

North and South

Tripod

Aluminum with accessory tray