Dark Clear Skies
UMi 20S
Proxisky UMi 20S Harmonic Mount — 30 kg Payload, Dual-Axis Anti-Collision
£2,499.00
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Proxisky UMi 20S Harmonic Mount – 30 kg Payload, Dual-Axis Anti-Collision
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Exclusive to Dark Clear Skies
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Proxisky UMi 20S is a flagship harmonic telescope mount designed for astrophotographers who need both capacity and precision. With a 22–30 kg payload capacity, high-speed slews up to 10°/s, and advanced dual-axis anti-collision protection, it’s built for serious imaging rigs. The mount features strain wave gear technology for ultra-smooth tracking and electromagnetic RA braking for added safety during power loss.
Key Features of the UMi 20S Harmonic Mount
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Harmonic/strain wave drive – high torque in a compact housing
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Payload capacity: 22–30 kg – ideal for large refractors and SCTs
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Dual-axis anti-collision – protects your equipment during slews
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Electromagnetic RA braking ≥ 68 N·m – prevents gear slip during power loss
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Fast GOTO slews: 5°/s standard, up to 10°/s maximum
- Supports iPolar and PoleMaster electronic polar scopes
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Self-locking wedge with dual-azimuth locking and titanium screws
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EQ and Alt/Az modes for imaging and visual astronomy
- USB, Bluetooth, Wi-Fi, and ST4 guiding port
UMi 20S Technical Specifications
| Mount Type |
German Equatorial / Alt-Az |
| Transmission |
Strain Wave Gear |
| RA Motor |
Servo, type-20 SWG, direct-drive |
| Dec Motor |
Servo, type-17 SWG, direct-drive |
| Payload Capacity |
22–30 kg |
| Head Weight |
5.4 kg |
| Slew / GOTO Speed |
5°/s (max 10°/s) |
| Polar Alignment |
iPolar / PoleMaster compatible |
| Power Input |
12–24 V DC, 3 A |
| Wedge |
Self-locking, dual-azimuth locking, titanium screws |
| Braking |
RA electromagnetic braking ≥ 68 N·m |
| Anti-Collision |
Yes, dual-axis |
| Home Position |
Mechanical |
| RA Limit |
Electronic |
| Connectivity |
USB, Bluetooth, Wi-Fi, ST4, UMi Mount App |
| Tripod Connection |
3/8″, M6 (CF40, TC40) |
| Operating Temperature |
−20 °C to 40 °C |
| Packaging |
Hard case with EVA foam |
Applications
The UMi 20S is ideal for high-end astrophotography mounts, heavy refractors, and large SCTs. Its harmonic drive and high torque make it well suited for deep-sky imaging and planetary work with long focal lengths.
UMi 20S FAQs
Is the UMi 20S dual-mode?
Yes – it supports both EQ and Alt/Az configurations.
Does it work with electronic polar scopes?
Yes – it is compatible with iPolar and PoleMaster (sold separately).
What’s the maximum payload?
Up to 30 kg with proper balance and counterweighting.
Is it portable?
Yes – despite its capacity, the head weighs just 5.4 kg.
