Quick Specs

Drive Train： BLDC motor + direct strain wave drive (100:1 reduction ratio)
Mode： Equatorial (EQ) / Altazimuth (AZ)
Encoder Resolution (motor)： 18bit
Periodic Error (PE)： ≤30 arcsec peak-to-peak
Mount Head Weight： 5.1 kg
Payload Capacity： Up to 30 kg @ 20 cm. No counterweight is required at or below 20 kg; above 20 kg, use the counterweight calculated in ATLAS SH20 Manual Section 8.7.

ATLAS SH20

Name: ATLAS SH20
Brand: ToupTek Astro
Price: 2299.00 USD
Availability: InStock

Equatorial Mount for Astrophotography

$2,299.00

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The ATLAS SH20 combines a lightweight 5.1 kg design with an impressive payload capacity of up to 30 kg @ 20 cm. Driven by a BLDC servo motor and 100:1 strain wave drive, it delivers precise, responsive tracking. Its one-touch EQ/Alt-Az mode switching requires no restart, while ToupTek’s fully in-house developed control system, software, and algorithms ensure seamless integration and optimized performance for both astrophotography and visual observing.

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Full Specifications

Drive Train： BLDC motor + direct strain wave drive (100:1 reduction ratio)
Mode： Equatorial (EQ) / Altazimuth (AZ)
Encoder Resolution (motor)： 18bit
Periodic Error (PE)： ≤30 arcsec peak-to-peak
Mount Head Weight： 5.1 kg
Payload Capacity： Up to 30 kg @ 20 cm. No counterweight is required at or below 20 kg; above 20 kg, use the counterweight calculated in ATLAS SH20 Manual Section 8.7.

Meet ATLAS SH20 Equatorial Mount

Designed for demanding astronomy enthusiasts, the ATLAS SH20 equatorial mount combines a compact 5.1 kg body with a payload capacity of up to 30 kg @ 20 cm. Its strain wave drive transmission, dual-axis 18-bit encoders, and precision tracking system make it a versatile solution for deep-sky astrophotography, visual observing, and a wide range of telescope setups. With support for both equatorial (EQ) and alt-azimuth (Alt-Az) modes, the ATLAS SH20 adapts to different observing and imaging needs, from long-exposure deep-sky sessions to visual observing and electronic-assisted astronomy.

The ToupTek ATLAS SH20 mount combines a 100:1 strain wave drive with a high-precision BLDC servo motor for smooth motion, precise positioning, and reliable tracking.

BLDC Servo Motor & High-Precision Harmonic Drive Tracking

Direct-Drive Strain Wave System: Direct motor-to-reducer transmission eliminates belts and minimizes mechanical backlash for smooth, precise movement.
BLDC Servo Motor & Dual 18-Bit Encoders: Precise positioning, responsive tracking adjustments, and smooth motion across a wide speed range.
No Belt Tensioning or Adjustment Required: Eliminates belt tensioning and aging-related issues, reducing routine maintenance.
Quiet Drive System: Enables quiet operation for an enjoyable nighttime observing experience.
Periodic Error Report: Periodic error of ≤30 arcsec peak-to-peak, backed by an individual PE test report.
10 Speed Settings & 3 Payload Modes: Speeds from 0.25× to 1440× (max 6°/s) and Light, Standard, Heavy modes.

Built around an in-house control system, the ATLAS SH20 equatorial mount combines flexible connectivity, cross-platform control, and compatibility with popular astronomy software.

In-House Hardware & Software

The ATLAS SH20 mount features custom-designed control hardware, drivers, firmware, and applications developed in-house for an integrated, expandable control system.

Native Apps for PC, Android & iOS

Control the mount with native applications for PC, Android, and iOS, giving you convenient access to mount operation across your preferred devices.

Broad Software Compatibility

The ATLAS SH20 mount supports ASCOM, INDI, and integrates with StellaVita for a streamlined imaging workflow.

Multiple Connection Options

Connect via Bluetooth, 2.4 GHz Wi-Fi, or a wired USB-C connection to suit your setup and workflow.

Dedicated MHC Hand Controller

An 8-direction joystick, LOCK switch, programmable press functions, built-in Wi-Fi hotspot, and coiled cable make hands-on control simple and convenient.

At just 5.1 kg, the ToupTek ATLAS SH20 mount is easy to transport while supporting telescope and imaging setups weighing up to 30 kg at a 20 cm lever arm.

Up to 20 kg without counterweights.
Up to 30 kg with counterweights at a 20 cm lever arm.
Three payload modes: Light, Standard, and Heavy to match your equipment.

From compact refractors to larger telescopes with a full imaging train, the SH20 mount offers the flexibility to build a setup around your goals.

(Payload ratings specified at 20 cm lever arm. For payloads above 20 kg, follow counterweight requirements in Section 8.7 of the manual.)

Equatorial (EQ) Mode For Deep-Sky Astrophotography

Track the night sky along the right ascension axis for long-exposure imaging of nebulae, galaxies, and star clusters, avoiding field rotation associated with ordinary alt-azimuth tracking.

Alt-Azimuth (Alt-Az) Mode For Visual Observing & More

Enjoy intuitive up-down and left-right movement for visual observing, quick sky tours, electronically assisted astronomy (EAA), and planetary imaging with no polar-alignment workflow required.

Flexible Connectivity & Intuitive Operation

All-in-One Power Solution

A 12V DC input supports a regulated 12V 5A supply, while the 12V 5A output powers accessories and reduces cable clutter.

Dual Dovetail Compatibility

Supports Vixen-style and Losmandy-style dovetails for a wide range of telescope setups.

Standard M12 Counterweight Interface

The standard M12 counterweight shaft interface supports compatible counterweights. Proper balancing helps reduce motor load during operation.

Clear Status Indicators

Dedicated Bluetooth and three-color system indicators show key connection and operating states, including startup, tracking, parking, and home-position

Dual-Scale Latitude Adjustment

Switch between the 0°–60° low-latitude scale and the 30°–90° high-latitude scale to cover the full 0°–90° range for use around the world.

Magnetic Hex Key Storage

Keep the included hex keys within easy reach for convenient setup and adjustment, even while wearing gloves.

Intelligent Mount Protection & Reliable Operation

Automatic RA-Axis Brake on Power Loss

A mechanical brake engages when power is lost, helping prevent uncontrolled movement of the telescope.

Dual-Axis Home Sensors

Mechanical home sensors, encoders, and FRAM support position recovery and hardware-level home calibration in abnormal conditions.

Adjustable Motion Limits

Set altitude and meridian limits through the software to help prevent equipment collisions during operation.

Real-Time Collision Monitoring

Monitors both axes and triggers a slight reverse movement followed by axis locking when a collision event is detected.

Overcurrent & Overvoltage Protection

Built-in overcurrent and overvoltage protection circuits help safeguard the mount when the power supply behaves abnormally.

Park Lock

Once the ATLAS mount is parked, movement commands are disabled, providing added security when installing or removing equipment.

Adjustable Audible Alerts

Command-response beeps with three volume levels provide convenient feedback during operation.

CNC-Machined All-Metal Structure

Precision CNC-Machined Aluminum Body: High-strength aluminum alloy delivers a durable structure without unnecessary bulk.
Fine Matte Anodized Finish: A refined, finely textured surface helps resist everyday wear and fingerprints.
Refined Silver-Gray Design: A clean, understated finish that complements a wide range of astronomy equipment.

Glove-Friendly Adjustment Knobs: Oversized knurled knobs with rounded edges provide a secure, comfortable grip for easy adjustments.
Ready for Extreme Conditions: Designed for operating temperatures from −20°C to +40°C. Heavy payload mode is recommended for low-temperature operation.(For low-temperature operation, the Heavy payload mode is recommended.)