Rainbow Astro’s RST-135 equatorial mount is based on innovative Harmonic Drive technology. Harmonic Drive technology results in a small light weight mount with an extremely high carrying capacity. The RST-135 weighs only 3.3 kg and is very small and light, but it can carry a payload up to 13.5 kg without using a counterweight. In addition, Harmonic Drive technology produces zero backlash allowing precision auto-guiding.

An optional counterweight bar and counterweight are available to support higher payloads up to 18 kg.

Please note the RST-135 is not supplied with a telescope saddle. We strongly recommend that customers also purchase the optional Rainbow Astro Vixen Type Saddle for RST Harmonic Drive Mounts.

The RST-135 is your ideal astro-travel companion.

Mount Type: Equatorial / Alt-Az Dual Mount
Type of Gear: Strain Wave Gear
Payload: 13.5kg (30lbs) – No need counterweight, 18kg (40lbs) – with counterweight
Slew Speed: 6º / Second
Latitude Range: 0º to 90º
Power Input: 12 to 16V DC
Power Consumption: 16V 0.2A – Tracking, 3A – Slewing,
Weight: 3.3kg (7.3lbs)
Size(mm): 130 x 120 x 190
Materials: AL 6061, Steel, Brass
ASCOM: Support ASCOM Driver
Hand Controller: Included
Additional Function: Built-in WiFi, Built-in GPS Receiver, Built-in Home Sensor

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Optional Products

Rainbow Astro RST Half Pier

$395.00 – $475.00

Backorder Now

RST-135 Counterweight

$245.00

Backorder Now

Rainbow Astro RST-135 Counterweight Shaft

$109.00

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Rainbow Astro Vixen Type Saddle for RST Harmonic Drive Mounts

$89.00

Backorder Now

RST-135 Compact Harmonic Drive Telescope Mount Head

SKU: RBA-RST-135

$7,305.00

Available on back-order

✅ Fast Shipping & Tracking

✅ Stocked in Melbourne, Australia

✅ Expert Advice

✅ Lifetime Technical Support

Lead time 3 to 4 weeks