Omegon AC 90/1000 EQ-2 Refractor Telescope

The Omegon AC 90/1000 EQ-2 is a classic long-focus refractor designed to give beginners a rewarding introduction to visual astronomy. Its 90mm achromatic objective, 1000mm focal length and equatorial EQ-2 mount make it particularly well suited to observing the Moon, planets and brighter deep-sky objects.

With more aperture than many smaller beginner refractors, the 90/1000 provides useful extra resolving power while its long f/11.1 focal ratio helps keep chromatic aberration under control.

90mm Achromatic Refractor Optics

The telescope uses a 90mm two-element achromatic objective. The long 1000mm focal length helps reduce the visible colour fringing commonly associated with shorter achromatic refractors, providing a clear and high-contrast image for visual astronomy.

Compared with an 80mm refractor, the 90mm aperture provides approximately 25% more light-gathering area, allowing finer detail to be seen on suitable astronomical targets.

The formal specifications give a resolving capacity of 1.28 arcseconds, limiting magnitude of 11.6 and a maximum useful magnification of 180x.

Excellent for Lunar Observation

The Moon is an ideal target for this telescope. Its craters, mountain ranges, plains and changing shadows can reveal a remarkable amount of detail through a 90mm refractor.

The long focal length also makes it straightforward to reach useful lunar magnifications with conventional 1.25-inch eyepieces.

Explore Jupiter, Saturn and Mars

The combination of 90mm aperture and 1000mm focal length makes planetary observing one of the main strengths of the Omegon 90/1000.

Jupiter can show its principal cloud belts and bright Galilean moons, while Saturn's ring system is readily accessible under suitable conditions. Mars can also reveal detail when it is favourably positioned and atmospheric seeing allows.

The supplied specifications identify Moon and planetary observing as a suitable application for this telescope.

Brighter Deep-Sky Objects

The 90mm aperture also opens the door to brighter deep-sky objects. Under suitably dark skies, targets such as the Orion Nebula, brighter star clusters and planetary nebulae can provide rewarding views.

The manufacturer gives a light-gathering capacity of 170, providing considerably more reach than the unaided eye for suitable celestial targets.

EQ-2 Equatorial Mount

The telescope is supplied on an EQ-2 equatorial mount. Once correctly polar aligned, an equatorial mount allows celestial objects to be followed more naturally as they move across the night sky.

Fine-motion controls on the right ascension and declination axes allow accurate positioning and manual tracking, while the counterweight balances the optical tube around the mount.

Learning how to balance and polar-align the EQ-2 also provides a useful introduction to the principles behind larger equatorial astronomy mounts.

Height-Adjustable Aluminium Tripod

The EQ-2 mount sits on an aluminium tripod. The legs can be extended to suit the observer and the supplied accessory tray provides a convenient place to keep eyepieces and other small accessories during an observing session.

1.25-Inch Rack-and-Pinion Focuser

A conventional rack-and-pinion focuser accepts standard 1.25-inch astronomical accessories.

The supplier description also specifies a T-2 thread, allowing compatible camera equipment to be attached with the appropriate adaptor.

Although simple lunar imaging may be possible with suitable equipment, this telescope is primarily intended for visual observing; the formal product specification does not recommend it as an astrophotography system.

Useful Accessories Included

The telescope is supplied with the core accessories needed to begin visual observing.

• 25mm 1.25-inch eyepiece – approximately 40x magnification
• 6.3mm 1.25-inch eyepiece – approximately 159x magnification
• 2x Barlow lens
• 1.25-inch 90° star diagonal
• Red dot finder

The instruction manual confirms these supplied accessories for the Omegon 90/1000 EQ-2. :contentReference[oaicite:3]{index=3}

A Strong Beginner's Refractor

The Omegon AC 90/1000 EQ-2 is particularly suited to someone who wants to learn astronomy with a traditional telescope rather than an automated GoTo system.

The 90mm refractor provides enough aperture to make the Moon and planets genuinely interesting, while the EQ-2 mount introduces the observer to balancing, polar alignment and manual celestial tracking.

What's Included?

• Omegon AC 90/1000 achromatic refractor
• EQ-2 equatorial mount
• Aluminium tripod
• Counterweight and counterweight shaft
• Accessory tray
• 25mm 1.25-inch eyepiece
• 6.3mm 1.25-inch eyepiece
• 2x Barlow lens
• 1.25-inch 90° star diagonal
• Red dot finder
• Instruction manual

Technical Specifications

Optics

Focuser

Mount

Tripod

Included Accessories

General

Area of Application

Recommended For

Omegon AC 90/1000 EQ-2 Instruction Manual

View the English instruction manual for assembly, balancing, setup and operation of the Omegon 90/1000 EQ-2 telescope.