Omegon N 150/750 EQ-4 Newtonian Reflector Telescope

The Omegon N 150/750 EQ-4 combines a versatile 150mm Newtonian reflector with the more substantial Omegon EQ-4 equatorial mount. With its 150mm aperture, 750mm focal length and fast f/5 optical system, it offers an excellent introduction to serious visual astronomy while remaining relatively compact and manageable.

The 150mm aperture provides enough light-gathering power to move well beyond basic lunar observation. Star clusters, bright nebulae, galaxies and planetary detail all become accessible, making this a telescope with plenty to explore as your experience grows.

150mm Aperture – A Big Step into Deep-Sky Astronomy

At the heart of the telescope is a 150mm Newtonian reflector. The larger aperture gathers considerably more light than smaller introductory telescopes, opening up a much wider selection of objects beyond the Solar System.

Under suitable observing conditions, globular clusters such as M13 and M92 begin to reveal their stellar structure, while bright emission nebulae such as the Orion Nebula become impressive visual targets. Numerous galaxies are also within reach from suitably dark skies.

The manufacturer's specifications give the telescope a limiting magnitude of 12.7, resolving capacity of 0.77 arcseconds and light-gathering capacity of 460.

Fast f/5 Newtonian Optics

The combination of 150mm aperture and 750mm focal length produces a relatively fast f/5 focal ratio. This makes the telescope particularly appealing for sweeping through rich star fields and observing larger deep-sky objects.

The optical tube is also relatively compact for a telescope of this aperture, measuring approximately 660mm in length with a specified tube diameter of 184mm.

Explore the Moon and Planets

The Omegon 150/750 is not limited to deep-sky observing. Its 150mm aperture provides sufficient resolving power for rewarding views of the Moon and brighter planets when atmospheric conditions allow.

On Jupiter, the main atmospheric cloud belts can be observed, while the changing positions of the four bright Galilean moons provide something different to follow from night to night. Under favourable conditions, shadows cast by these moons as they transit Jupiter can also be visible.

Saturn and its ring system, Mars around favourable oppositions and the changing phases of Venus provide further Solar System targets.

EQ-4 Equatorial Mount

A capable telescope needs a suitably stable mount. The supplied Omegon EQ-4 is an equatorial mount designed to provide a more substantial platform than the lighter EQ-3.

Once correctly polar aligned, celestial objects can be followed primarily through movement of the right ascension axis. Slow-motion controls on both the right ascension and declination axes allow precise manual positioning and tracking.

A counterweight balances the optical tube, helping the mount move smoothly and remain stable during observation.

Built-In Polar Finder

A particularly useful feature of the EQ-4 is its polar finder scope. This assists with more accurate polar alignment of the equatorial mount than simply pointing approximately towards Polaris.

The mount provides a specified polar elevation adjustment range of 20° to 70°.

Why Choose the EQ-4?

Compared with Omegon's lighter EQ-3 mount, the supplied manufacturer information identifies several advantages of the EQ-4:

• Greater overall stability
• Reduced susceptibility to vibration
• Stronger counterweight bar
• More substantial polar axis assembly
• Finer azimuth adjustment
• Integrated polar finder scope

These improvements make the EQ-4 particularly worthwhile when paired with a 150mm Newtonian, where mount stability becomes increasingly important for comfortable focusing and higher-magnification observing.

Optional Motorised RA Tracking

The EQ-4 can be upgraded with the compatible Omegon RA Motor Set. The motor drives the right ascension axis at sidereal speed, reducing the need to continually make manual corrections as astronomical objects move across the sky.

This can make visual observing more comfortable and provides a useful introduction to motorised equatorial tracking.

Supplied Eyepieces

Two 1.25-inch Plössl eyepieces are supplied:

• 25mm Plössl – approximately 30x magnification
• 6.5mm Plössl – approximately 115x magnification

The 25mm eyepiece provides a wider field of view suitable for finding objects and observing larger targets, while the 6.5mm eyepiece provides substantially higher magnification for smaller objects and planetary detail.

2x Barlow Lens Included

A 2x Barlow lens is also included. When used with a compatible eyepiece, a Barlow effectively doubles the magnification produced by that eyepiece.

The telescope itself has a manufacturer-specified maximum useful magnification of 300x, although the practical magnification available on any particular night will depend heavily on atmospheric seeing, optical alignment and the target being observed.

Red Dot Finder

The supplied red dot finder provides a simple way to point the telescope towards a target before viewing it through the main eyepiece.

Rather than providing a magnified finder view, a red dot finder projects an aiming reference against the sky, making it intuitive for beginners learning their way around the constellations.

Collimatable Newtonian Optics

The primary and secondary mirrors can be adjusted for collimation. Correct collimation aligns the mirrors with the optical axis and is an important part of obtaining the best possible performance from a Newtonian reflector.

Collimation may sound complicated to a first-time Newtonian owner, but it is a normal part of owning and maintaining this type of telescope.

Astrophotography – What to Expect

The equatorial EQ-4 mount and polar finder provide a useful introduction to the principles of polar alignment and celestial tracking, and the supplier specifically mentions taking first photographs of subjects such as the Moon.

However, the manufacturer's formal application specification rates this telescope as not recommended for astrophotography. We therefore recommend viewing the N 150/750 EQ-4 primarily as a visual astronomy telescope, rather than a dedicated long-exposure deep-sky imaging system.

For beginners interested in experimenting with imaging, lunar and planetary work is the more appropriate place to start.

Key Features

• 150mm Newtonian reflector telescope
• 750mm focal length
• Fast f/5 focal ratio
• Compact 660mm optical tube length
• EQ-4 equatorial mount
• Slow-motion adjustment on RA and DEC axes
• Built-in polar finder scope
• Aluminium tripod
• 1.25-inch rack-and-pinion focuser
• 25mm Plössl eyepiece included
• 6.5mm Plössl eyepiece included
• 2x Barlow lens included
• Red dot finder included
• Optional compatible RA motor drive available separately
• Suitable for lunar, planetary and deep-sky visual observation

What's Included?

• Omegon N 150/750 Newtonian optical tube
• Omegon EQ-4 equatorial mount
• Aluminium tripod
• Counterweight system
• Polar finder scope
• 25mm Plössl 1.25" eyepiece
• 6.5mm Plössl 1.25" eyepiece
• 2x Barlow lens
• Red dot finder

Technical Specifications

Optics

Focuser

Mount

Tripod

Included Accessories

General

Area of Application

Recommended For

Instruction Manual

View or download the English instruction manual for the Omegon N 150/750 EQ-4.