Levenhuk Ra 250N Dobson Telescope

£999.95 inc Vat

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Newtonian telescope with a built-in primary mirror cooling fan. Aperture: 250mm. Focal length: 1250mm
Warranty: lifetime
Shipping weight: 35.5 kg
Package size (LxWxH): 145×50×50 cm

Levenhuk Ra 250N Dobson Telescope Astronomy

15 In-stock order will be delivered to you within 4-5 working days

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    Levenhuk Ra 250N Dobson is a Newtonian reflector with a 250mm diameter primary mirror. Its optics allow for observing thousands of deep-sky objects in detail that cannot be observed with small-aperture telescopes. You can also use this telescope for outer space exploration. For example, you can observe small structures on Mars’s surface, details in the atmosphere of Jupiter, the Encke gap within Saturn’s rings, and even a satellite of Neptune, Triton. It is an excellent optical instrument for visual observations of space that is best suited for trips to the countryside.

    Parabolic primary mirror with active cooling of the optics

    The parabolic primary mirror creates a clear image free from optical distortion, even at extreme magnification. Its surface is covered with an aluminum coating that reflects 92~96% of light improving image quality. Due to the dual-speed Crayford focuser, the focus can be smoothly adjusted.

    The primary mirror features a cooling system that runs on batteries (purchased separately). If any telescope is moved from a warm room to a cold street and vice versa, the optics will take several hours to “cool down”. The built-in fan speeds up temperature stabilization almost twofold.

    Stable and reliable Dobsonian mount with a brake system side bearing for smooth tube movement

    The Dobsonian mount is easy to assemble and handle. It reliably holds the optical tube and allows you to carry out long-term observations with maximum comfort. The mount mechanics has been improved. Now, the movement of the tube is smooth so that tracking objects at high magnification is much more comfortable.

    A special brake system side bearing for smooth tube movement allows you to move the optical tube a few centimeters up or down. There are scales on the mount sides for convenient balancing. In addition, the bearings have a more robust design (compared to conventional ones), and so they will run smoothly throughout their entire service life.

    Quick start kit

    The telescope kit includes base accessories that allow you to start observations right away. 9mm and 30mm eyepieces are ideal for your first introduction to deep space. An 8x50mm optical finder is used to search for objects.


    • Reflector with a high aperture, ideal for deep space observations
    • Parabolic primary mirror – no distortion even at extreme magnification
    • Special aluminum coating with a reflectivity index of 92~96%
    • Active cooling of optics for faster temperature stabilization
    • User-friendly and easy-to-assemble Dobsonian-style mount
    • Dual-speed Crayford focuser, brake system side bearing for smooth tube movement

    The kit includes:

    • Telescope optical tube
    • Dobsonian mount
    • Plössl 9mm eyepiece
    • Super View 30mm eyepiece
    • Finder 8x50mm
    • Finderscope base
    • Cooling fan
    • User manual and lifetime warranty
    Optical design Newtonian reflector
    Optics material BK-7 glass
    Optics coating aluminum
    Primary mirror diameter (aperture), mm 250
    Lens (mirror) shape parabolic
    Focal length, mm 1250
    Highest practical power, x 508
    Focal ratio f/5
    Resolution threshold, arcseconds 0.5
    Limiting stellar magnitude 14.7
    Eyepieces Plössl 9mm (138x), Super View 30mm (41х)
    Eyepiece barrel diameter 1.25/2
    Finderscope optical, 8×50 mm
    Focuser 2” dual-speed Crayford
    Telescope control manual
    Mount Dobsonian
    Additionally Primary mirror cooling fan
    Operating temperature range, °C
    −5… +35
    Power source cooling fan: 6 AA batteries (not included)
    Tube-mount assembly system Brake system side bearing for smooth tube movement
    Optical tube material metal
    Usage General use product.
    May be used by kids over 3 years old.
    User level expert
    Observed objects deep-sky objects
    Contact us on 01392 343050, or email us at explore@exploreoutside.co.uk.
    Free Delivery 5-7 Days (orders over £75)
    In-stock orders will be delivered to you within 5-7 working days.

    Standard Delivery 3-4 Days (£4.95)
    In-stock orders will be delivered to you within 4-5 working days.

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    - All returned products must be in perfect saleable condition with tags and labels still attached
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    Levenhuk Ra 250N Dobson Telescope Astronomy