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Sky-Watcher EQ8-Rh Mount Head Only with Counterweights

SKU SW-S30712
Original price CA$14,530.00 - Original price CA$14,530.00
Original price
CA$14,530.00
CA$14,530.00 - CA$14,530.00
Current price CA$14,530.00
Price Match Policy!
  • 110 lbs payload capacity for observatory-class instruments
  • Whisper-quiet dual belt-drive system for smooth, precise tracking
  • Through-mount cable management with four USB 3.0 ports
  • SynScan GoTo system with a 42,900+ object database
  • Includes two 22 lbs counterweights
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty
  • Sky-Watcher EQ8-Rh Pro Mount Head Only with Counterweights

    The Sky-Watcher EQ8-Rh Pro Mount Head delivers observatory-grade stability with a massive 110-pound payload capacity, easily supporting large optical tubes and imaging trains. Its SynScan GoTo system navigates to over 42,900 celestial objects using precise 0.9° hybrid stepper motors. This package includes two 22-pound counterweights to balance substantial telescope setups right out of the box.

    Observatory-Grade 110 lbs Payload Capacity

    Engineered with all-metal construction, the EQ8-Rh Pro provides the rigidity required for serious astrophotography. The 110-pound payload capacity accommodates large refractor, reflector, or Schmidt-Cassegrain systems without compromising tracking accuracy. The mount head itself weighs 56.8 pounds, and features large locking levers and D-style saddle knobs designed for easy use, even with gloves on in cold conditions.

    Integrated Thru-Mount Cable Management

    A fully integrated cable management system eliminates the primary cause of tracking errors and equipment snags in advanced setups. The system provides a hub of ports that pass through the mount's axes, ensuring no external wires can get caught as the mount slews across the sky. This is critical for remote and automated observatories.

    • Data and Power Hub: Four USB 3.0 ports, three 2.1mm power ports, and three serial connections are available on the saddle plate, keeping your camera, filter wheel, and focuser connections tidy and secure.
    • Physical Hard Stop: An internal hard stop prevents the mount from rotating past its limits, protecting your cables and expensive equipment from being snapped or damaged.

    0.9° Stepper Motors & Belt-Drive System

    The EQ8-Rh Pro's tracking is driven by 0.9° hybrid stepper motors linked to the worm gears via a dual belt-drive system. This design significantly reduces backlash and the high-frequency periodic error common in traditional gear-driven mounts. The result is exceptionally smooth, quiet slewing and tack-sharp stars during long exposures, further enhanced by PPEC (Permanent Periodic Error Correction) training capabilities.

    SynScan GoTo with 42,900+ Object Database

    Control the EQ8-Rh Pro with the included SynScan hand controller or directly from a PC. The controller's database contains over 42,900 objects, including complete Messier, NGC, IC, and SAO catalogs. Choose from one-, two-, or three-star alignment procedures for accurate pointing across the entire sky, with slew speeds up to 1000x sidereal rate to get you to your target quickly.

  • What type of telescope can I use with the EQ8-Rh Pro's 110-pound capacity?

    With a 110-pound payload capacity, the EQ8-Rh Pro can carry large observatory-class instruments. This includes large Schmidt-Cassegrains (14" or more), large Newtonian astrographs (12" or more), or long focal length refractors (6-7"), along with heavy imaging equipment like cooled cameras, filter wheels, and off-axis guiders. For astrophotography, a good rule is to stay at or below 75% of the rated capacity for optimal guiding.

    How does the EQ8-Rh Pro belt-drive system improve imaging of the Orion Nebula (M42)?

    When performing long-exposure astrophotography on targets like the Orion Nebula (M42), smooth, consistent tracking is essential to keep stars from trailing. The EQ8-Rh Pro's dual belt-drive system minimizes backlash and high-frequency periodic error. This results in rounder stars and allows your autoguider to make finer, less aggressive corrections, which is critical for revealing the faint outer details of the nebula.

    What is the benefit of the thru-mount cable management on the EQ8-Rh Pro?

    Thru-mount cable management prevents "cable drag" or snagging, a common problem where wires from your camera or accessories get caught as the mount tracks or slews. The EQ8-Rh Pro provides four USB 3.0 ports, three power ports, and three serial connections directly on the mounting saddle, keeping all connections neat, secure, and moving with your telescope. This is especially crucial for automated or remote imaging sessions where you can't physically monitor the setup.

    What power supply do I need for the Sky-Watcher EQ8-Rh Pro?

    The mount requires a DC power source that can deliver between 11V and 16V at 3 amps. A secure, thread-on aircraft-style power connector is used to prevent accidental disconnection during an imaging session. You can use a high-amperage AC-to-DC adapter or a portable deep-cycle battery field power supply.

    Does the EQ8-Rh Pro come with a polar scope?

    No, the polar scope for the EQ8-Rh Pro is an optional accessory and is sold separately. While not required for polar alignment (methods like drift alignment or software-assisted alignment can be used), the optional polar scope can make the initial setup process faster and easier.

    What are the homing sensors on the EQ8-Rh Pro used for?

    The built-in homing sensors allow the mount to find its home position automatically. This is a significant advantage for remote observatories. After powering on, the mount can be commanded to return to a known, fixed starting position (typically pointing at the celestial pole), which ensures consistent startup and helps re-establish sky alignment without manual intervention.

  • UPC 050234307123
    Mount Type High-capacity motorized equatorial (EQ)
    GoTo Yes
    Payload Capacity 110 lbs
    Mount Head Weight 56.8 lbs
    Mount Head Height 19.5"
    Saddle Type D-style
    Power Requirements DC 11-16V, 3 amp
    Cable Management Four USB 3.0 ports, Three 2.1mm power ports, Three serial connections
    Latitude Range 10° to 65°
    Object Database 42,900 total objects (Messier, NGC, IC, SAO catalogs, 25 user-defined)
    Controller SynScan hand controller or PC direct control
    Alignment Procedures One-, two-, and three-star alignment
    Slew Speeds 1000x, 800x, 600x, 400x, 200x, 32x, 16x, 8x, 2x, 1x
    Motor Type 0.9° hybrid stepper motor
    Drive System Belt drive
    PC Direct Connect Yes
    Included Counterweights Two 22 lbs weights
    Polar Scope Sold separately
    WiFi Connectivity Optional WiFi dongle sold separately
    GPS Optional SynScan GPS sold separately
    • EQ8-Rh Mount Head

      × 1

    • Counterweight Shaft

      × 1

    • 22 lbs Counterweight

      × 2

    • SynScan Hand Controller

      × 1

    • DC Power Cable

      × 1

  • Sky-Watcher 2-Year Limited Warranty