Sky-Watcher Wave 100i vs Wave 150i Comparison

Mounts based on Harmonic Drive technology have significantly changed modern astrophotography, especially for mobile and travel setups. High payload capacity, compact size and near-zero backlash operation allow accurate tracking even without counterweights.

Within this context, the Sky-Watcher Wave series stands out as one of the most advanced solutions for demanding astrophotographers. Two models are most frequently compared: the Wave 100i and the Wave 150i.

This comparison goes beyond simple specifications and focuses on real-world use, helping you understand which mount best matches your telescope, imaging setup and observing style.

What is a Harmonic Drive mount and why does it matter?

Harmonic Drive mounts use precision strain wave gear reducers on both the Right Ascension (RA) and Declination (DEC) axes. This design provides key advantages:

• virtually zero mechanical backlash
• extremely smooth and consistent motion
• high tracking and pointing accuracy
• operation without counterweights in many setups

Both the Wave 100i and Wave 150i use a 300:1 reduction ratio on both axes, making them well suited for long-exposure astrophotography with medium to long focal lengths when properly balanced.

Payload capacity: specifications vs real-world performance

The main difference between the Wave 100i and Wave 150i lies in their usable payload capacity, especially when fully equipped imaging trains are involved.

Sky-Watcher Wave 100i

• 10 kg without counterweights
• 15 kg with counterweights
• Mount weight: approx. 4.3 kg

The Wave 100i is ideal for medium-sized refractors, compact Newtonians and lightweight imaging setups. A unique feature is its ability to carry two optical tubes simultaneously, allowing parallel visual observation and imaging or flexible dual-scope configurations.

Sky-Watcher Wave 150i

• 15 kg without counterweights
• 25 kg with counterweights
• Mount weight: approx. 5.8 kg

The Wave 150i is designed for heavier telescopes, larger apertures and more complex imaging trains. The increased payload capacity provides greater stability margins, making it especially suitable for deep-sky astrophotography at longer focal lengths.

Portability and usage philosophy

Both mounts are designed for mobile astrophotography, but with slightly different priorities:

• Wave 100i: ultra-compact, extremely lightweight, perfect for travel setups and frequent assembly.
• Wave 150i: higher rigidity and payload capacity, ideal for demanding setups while remaining portable.

Tracking, GOTO and guiding performance

Both models deliver very accurate tracking, particularly when combined with autoguiding. Harmonic Drive transmission ensures smooth motion and minimizes periodic error effects.

A maximum slewing speed of 2400X (approximately 10°/s) allows fast GOTO movements, reducing setup time during automated imaging sessions.

Connectivity and control

Wave 100i and Wave 150i share the same connectivity options:

• integrated Wi-Fi and Bluetooth
• USB-B port
• RJ45 for SynScan hand controller
• RJ12 autoguider port
• SNAP port for direct camera control

Control via Sky-Watcher SynScan PRO (iOS and Android) enables full management of alignment, GOTO operations and tracking, and integrates smoothly with common astrophotography workflows.

Comparison table

Which one should you choose?

The Sky-Watcher Wave 100i is ideal if:

• you use compact or medium-sized telescopes
• maximum portability is a priority
• you frequently travel or image on location
• you want the flexibility of a dual-scope setup

The Sky-Watcher Wave 150i is the better choice if:

• you use heavier telescopes or longer focal lengths
• you want greater stability margins
• you perform advanced deep-sky astrophotography
• you are looking for a more future-proof solution

Conclusion

Wave 100i and Wave 150i share the same high-quality design philosophy and differ not in quality, but in intended use. The correct choice depends on balancing your telescope, imaging train and astrophotography goals.