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
| Specification | |
|---|---|
| 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 |
| Specification | |
|---|---|
| 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) |
| Free Shipping | Yes |
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