RST-135 Robotic Mount
RST-135 Robotic Mount
RST-135 Robotic Mount
RST-135 Robotic Mount
RST-135 Robotic Mount

Rainbow Astro

RST-135 Robotic Mount

Regular price
$ 3,895.00
Sale price
$ 3,895.00
Unit price

This item is out of stock but you can place an order now and we’ll ship when it becomes available.

You can take your dream shot from anywhere with this extremely portable mount. No backlash and NO need for counterweights!


The RST-135 uses a new type of gear called a strain wave gear. Due to the strong force provided by the strain wave gear and motor, a counterweight is not needed. The mount weights only 3.3kg (7.27lbs), but can carry a payload up to 13.5kg (29.76lbs). Rainbow Astro calls this breakthrough mount a Weightless Mount. The volume and weight of the mount is no longer a problem when travelling for astrophotography.

NOW AVAILABLE IN MULTIPLE COLOR OPTIONS!  NOTE: Colors other than standard gray are a special order and will have an additional lead time.


Compact and light

  • The mount weighs only 3.3kg (7.27lbs). You do not need a separate bag for the mount: Just put it in your backpack.

Equatorial / Alt-Az dual Mount

  • You can easily change between Equatorial mode and Alt-Az mode, allowing for both photographic and visual use of your instrument.

No counterweight needed

  • You do not need a counterweight to use the mount and it can carry a payload up to 13.5kg (29.76lbs).

Beauty of a machined product

  • Feel the beauty of a machined product. All parts of RST-135 are made by machining a solid block. The RST-135 is the perfect premium mount.

Strain wave gear

  • The strain wave gear is a new type of gear that is widely used in industrial robots. There is no backlash.

Built-in WiFi

  • This mount has built-in WiFi in the hand controller. You can control and auto-guide the mount without running a cable to your PC.

Built-in GPS receiver

  • The built-in GPS receiver eliminates the need to enter your location during each session or if you travel with the mount.

Built-in Home sensor

  • The home sensor finds the mechanical origin by itself. This is useful for remote observation.


  • Mount Type
    • Equatorial / Alt-Az Dual Mount

  • Type of Gear
    • Strain Wave Gear
  • Payload
    • 13.5kg (30lbs) - No counterweight
    • 18kg (40lbs) – Using a counterweight
  • Slew Speed
    • 6º / Second
  • Latitude Range
    • 0º to 90º
  • Power Input
    • 12 to 16V DC

  • Power Consumption
    • 0.2A - Tracking, 16V 
    • 3A - Slewing, 16V
  • Weight
    • 3.3kg (7.3lbs)
  • Size(mm)
    • 130 x 120 x 190
  • Materials
    • AL 6061, Steel, Brass

  • ASCOM 
    • Supports ASCOM Drivers
  • Hand Controller Included
  • Additional Function
    • Built-in WiFi
    • Built-in GPS Receiver
    • Built-in Home Sensor

Personal Upgrade Path

Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.