Pegasus Astro NYX-101 has replaced Losmandy GM-8 as my primary imaging mount. NYX-101 is a harmonic drive mount that for payloads up to 20kg needs no counterweights. The mount is well built but not too heavy, only about 7kg. That makes it very convenient for me, since I have no permanent setup. When I want to do some imaging I have to set up the equipment from the scratch. Compared to Losmandy GM8 there is less to carry, and set up time is almost halved.

To help with polar alignment the mount is prepared to accept QHY Polemaster. With its help accurate polar alignment can be achieved within 10 minutes. Knobs and mechanism to adjust and fix Altitude and Azimuth could be better, but after some time you get used to them.

Regarding guiding precision, the mount is not the best for unguided imaging. That is typical for harmonic drive mounts without encoder. But it is performs very well for guided imaging and visual use. I guide it with PHD2 using Predictive PEC and 1s guiding intervals with very good results.

Unlike my completely manual GM-8, this is a robotic mount that can find the imaging targets automatically. After 3 Star Alignment routine objects are consistently positioned on the imaging sensor using 650mm FL telescope, even with smaller sensors like IMX178. That really saves a lots of time and makes imaging sessions more productive.

NYX-101 can be equipped with Saddle Powerbox which makes arranging cables much easier. Cable management is very important when using harmonic drive mounts. They are very strong, and if a cable snags something will break. For the same reason one must be very careful when imaging past the meridian (the mount is able to guide up to 2 hours past meridian). If a camera hits a tripod leg something will break also.

The Saddle Powerbox provides all the connections and interfaces sufficient for a moderate imaging setup: USB hub with 2 USB 3 and 2 USB 2 ports with USB 3 uplink towards PC, 2 Channels PWM ports for Dew Heaters and 4 12V ports with 2.1mm outputs. It contains even a temperature and humidity sensor. In my setup it is powered from the 12V output on the mount. The saddle accepts both Losmandy and Vixen style dovetails. Saddle Powerbox is delivered with a selection of useful cables, and more can be purchased from Pegasus Astro.

Both the mount and the powerbox may be controlled via Pegasus Astro Unity software. Unity software provides lots of configuration, operation and information capabilities. The software is available for PC (Windows), Android and IOS. On a mobile phone it can be used as a sort of replacement for a hand controller. I've also tried controlling the mount via Stellarium software, and it works pretty well.

Here you can see the mount on top of Pegasus Carbon Fiber Tripod with half-pier extension. The tripod is very light, it has only 2kg and it can support imaging setups with weight up to 15kg. Maximum weight it can hold is stunning 50kg. Although the tripod is made for portability it is also quite stable. The mount (and via the mount the whole setup) is powered by 13.5V stabilized power supply.

Since the mount and the tripod are fairly light, they are rather sensitive to wind. Stability of the mount can be improved with heavier tripods or piers. Adding counterweight shaft with counterweights will also help. However, all of that will impact portability and ease of setup.