1. Experience and focus on one thing
A company that makes focusers as their primary product knows focuser mechanics. A company that makes focuser controllers as their primary product knows motor control, microstepping, backlash management, temperature compensation, and the software that drives all of this. These are different disciplines. Lunatico has been building focuser controllers for over two decades — the firmware, the ASCOM drivers, the edge cases — and that accumulated experience is embedded in every controller we ship.
2. Better engineering for each job
When the controller is external, both parts can be engineered optimally for their job. The focuser is optimised for rigidity, precision, and smooth motion. The controller is optimised for motor drive quality, position resolution, and connectivity. An all-in-one design makes compromises on both sides to fit everything into a single enclosure.
3. Versatility — use with any focuser
An external controller like the Armadillo, Platypus, Tarsier, or Limpet can motorise almost any focuser on the market — including your existing one. You are not locked into a single brand or design. If you upgrade your telescope, change your focuser, or want to motorise a second scope, the same controller works. You are buying capability, not a tied system.
The Lunatico range covers a wide spectrum: from the lightweight Limpet for smaller setups to the Armadillo and Platypus for larger Crayford and rack-and-pinion focusers, and the Tarsier for medium setups requiring a high-torque motor.
4. Software quality
The ASCOM Focuser driver for Lunatico controllers has been refined continuously across years of real-world use. It supports temperature compensation with configurable coefficients, precise backlash correction, absolute position memory, and multi-speed operation. The driver integrates with all major planetarium and imaging software — N.I.N.A., SGPro, ACP, Sequence Generator, MaxIm DL, and more — without workarounds.
Lunatico focuser controllers are also DragonFly-aware: a DragonFly-connected focuser controller can be managed from the same interface as the rest of your observatory, and temperature compensation data from the DragonFly's sensors can feed directly into focuser compensation calculations.
5. Price
Adding an external controller to a quality manual focuser you already own is almost always less expensive than replacing it with an equivalent motorised all-in-one unit. And the focuser itself will likely outlast several generations of controllers — so separating them makes financial sense over the life of the equipment.