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Cyclops Optics

Rainbow Astro RST-135 RedCat Edition

Discontinued. New version available, see below.

Rainbow Astro RST-135 RedCat Edition

Discontinued. New version available, see below.
Shipping Weight:
6.00 KGS
Discontinued. See below for link to the new version

Product Description

Now available with the NEW Polar Alignment Base

 Instruments loading (without counterweight): 13kg

Instruments loading (with counterweight): 18kg

Mount weight: 3.2kg

Super small and lightweight

The mount weighs only 3.3kg. Plus, it fits in one hand, so you don’t need a big bag for the mount.

Counterweights Not Required

Counterweights not required. Of course, no effort is required to balance.

Strain Wave Gear(Harmonic Drive)

Instead of worm gears, a new type of reducer called strain wave gear (harmonic drive) is used. Almost no backlash and no maintenance is required. As it is widely used in industrial robots, it is very durable.

CNC Machining

CNC machined aluminum alloy AL6061 is used for aircraft. That’s why it’s small, light and stiff. The beauty of the machined surface increases the collection value.


WiFi is built in. You can control the mount via the SkySafari app on your smartphone. Ascom Driver can be connected via WiFi as well as USB. GOTO and AutoGuide are now wireless.

GPS Receiver

GPS receiver is built in. The position and time of the observer can be entered accurately and conveniently.

Home Sensor

There is a built-in home sensor to find the mechanical origin. This is useful for permanently using Star Alignment data. Build an ultra-small remote observatory with the RST-135 mount. 


Included in the package

  • RST-135 mount

  • Hand controller (Hubo-i SE)

  • Cable for hand controller

  • USB cable

  • Power cable (Alligator)

  • Power cable (5.5×2.1 DC Jack)

  • Adapter for camera tripod(3/8″ tap)

  • Adapter for PoleMaster

  • Soft case

  • 4mm Hex Wrench


Specifications – Mechanical

Mount type Dual mount – German Equatorial, Alt-Azimuth
Reducer Strain wave gear (Harmonic Drive)
Load Capacity 13.5kg(without counter weight), 18kg(with counter weight)
Recommend Telescope 8inch Reflector, 5inch Refractor
Weight 3.3kg
Volume 14.4 x 13.1 x 19.5 cm
Material Aluminum alloy AL6061, Steel, Brass
Surface coating Anodizing
Reducer size(RA) Model No. 17 (Based on HDS)
Reducer size(DEC) Model No. 14 (Based on HDS)
Motor Swiss made Maxon DC Servo Motor
Latitude range 0 to 90 degrees

Specification – Controller

Max Slew Rate 1,800x (7.5deg/sec) – 16V DC
Input Power DC 12V ~ 16V
Power Consumption(Tracking, 12V) 0.2A
Power Consumption (Slew, 12V) 1.0~2.0A
PC Connection ASCOM Driver
GPS Built-in (Hand Controller)
WiFi Built-in (Hand Controller)
Home Sensor Built-in

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