In the landscape of equatorial mounts, Proxisky’s UMi series carves out a unique space, delivering powerful performance and precise mechanics in a lightweight package. Designed with travel and imaging in mind, the UMi 17R, UMi 17S, and UMi 20S represent a new generation of strain wave gear mounts. Whether you’re setting up under a backyard sky or in a remote dark-sky desert, the UMi series is ready to deliver seamless, accurate tracking in a compact and beautifully engineered form.
Compact design with serious capability
All UMi mounts are built around a compact fork-style equatorial architecture that maximizes portability without sacrificing performance. They are crafted from high-quality materials with an integrated design that reduces flexure and simplifies field setup.
- UMi 17R: The most compact of the three, designed for visual and light imaging setups.
- UMi 17S: An upgraded version of the 17R, offering more refined periodic error and smart automation features.
- UMi 20S: A higher-capacity model for heavy-duty astrophotography rigs, while still maintaining travel-friendly dimensions.
Their small form factor makes them perfect for photographers on the go, with gear that’s easy to carry but built for professional results.
Precision through strain wave gearing
Like the Ragdoll series, the UMi mounts use advanced strain wave gear systems (also known as harmonic drives). This ensures compact size and high torque with minimal backlash—ideal for accurate long-exposure imaging.
- UMi 17R & 17S: Feature a Type-17 strain wave gear mechanism.
- UMi 20S: Upgrades to a Type-20 strain wave gear, offering greater load capacity and tracking power.
All models use hybrid stepper motors for smoother motion and reduced vibrations, supporting guided and unguided imaging sessions.
Smarter automation with the “S” models
Proxisky adds smart features in the 17S and 20S models, making them especially appealing for remote or automated observatories:
- Home Sensors: Automatically set the mount’s start and park positions—ideal for scripted imaging routines.
- Adjustable RA Limit Sensors: Prevent over-travel and protect attached equipment.
- Improved Periodic Error Correction: The S models offer factory-optimized periodic error, typically under ±10 arcseconds.
All UMi mounts support ASCOM, INDI, and OnStepX protocols, allowing seamless integration with astronomy control software across platforms.
Side-by-side comparison: UMi mounts at a glance
Here is the specification and comparison chart of all the UMi series mounts:
Designed for the road, engineered for the sky
The UMi series is an excellent example of what modern mount engineering can accomplish. These mounts don’t just meet the needs of field astrophotographers—they anticipate them. With their no-fuss design, powerful motors, and automation-ready features, UMi mounts are trusted companions for both adventure-focused astronomers and serious imaging veterans.
Whether you’re chasing solar eclipses, documenting deep-sky images, or simply upgrading your backyard rig, the UMi 17R, 17S, and 20S offer performance and portability in equal measure.
Clear skies!
