RainBow Astro RST-300

RainBow Astro RST-300

Rainbow Astro RST135 half piers

Rainbow Astro RST135 half piers

Rainbow Astro RST-135E MNT000900


RST-135E Weightless Mount Counterweights Not Required Only 3.4kg weight 2.5arcsec PE Capacity 13.5kg (max 18kg) Strain Wave Gear (Harmonic Drive) Renishaw encoder 5-years warranty

This mount uses a strain wave gear instead of a worm gear.

Both Equatorial and Alt-Az are possible.

It can carry 30lbs without using counterweight. But its weight is only 7.3 lbs!!

See the bottom of the page for the recommended carbon fiber tripods on Amazon


$50 off QHY Polemaster when purchased together

Lead time is 1 - 2 weeks

Price Range: $5,495 to $7,200



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 3.4kg
Volume 14.4 x 13.1 x 25 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
High resolution encoder Built-in RA axis, Renishaw


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
Compatibility ASIAIR, StellarMate
Periodic error ±2.5arcsec (430sec)

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