GEM45 Mount Head

The GEM45 is a high‑capacity, precision German equatorial mount head designed for serious visual and deep‑sky astrophotography use. With a lightweight yet robust build and advanced features, it’s engineered to support demanding imaging setups while offering great flexibility and control.

Key Features & Highlights:

• Payload capacity: supports up to 45 lb (≈20 kg) of equipment (excluding counterweights) while weighing only ~17.4 lb (≈7.9 kg).
• Precision mechanical design: all‑metal CNC‑machined structure, dual saddle capable of both Losmandy‑D & Vixen dovetails, steel 45 mm RA/Dec shafts and large bearings (Ø68 mm).
• High precision tracking: Periodic error (PE) < ±7 arcseconds (typical) on the standard model. Includes Permanent Periodic Error Correction (PPEC) and zero‑backlash worm gears.
• Integrated alignment & control features: Built‑in electronic polar scope (iPolar™) for accurate polar alignment, quick‑lock drive clutch levers, internal cable‑management system to reduce snagging and clutter.
• GoTo capability: Equipped with the Go2Nova® hand controller, star database of 212,000+ objects, USB and ST‑4 autoguider ports.
• Modern finish & ergonomics: Red/black anodized finish, compact form, designed for both field portability and observatory use.

Why It Stands Out:
The GEM45 offers one of the best payload‑to‑mount‑weight ratios in its class (~2.5:1), meaning you can mount a large optical train without excessive bulk. Its combination of high capacity, precision tracking, excellent build quality and modern control features make it an excellent choice for advanced astrophotographers who demand both usability and performance.

Typical Use Cases:

• A loaded imaging rig: large APO refractor or Ritchey‑Chrétien telescope plus imaging camera, filter wheel, guider and heavy mounting hardware wishing to maintain tracking accuracy and stability.
• Transition from visual use to serious astrophotography, where accurate pointing, guiding and alignment become critical.
• Field deployment: though robust, the mount head is light enough for transport to dark‑sky sites, especially when paired with a suitable tripod.
• Observatory installation: as a head only option (without tripod) the GEM45 can serve as the heart of a permanent pier‑mounted imaging system.

Installation & Compatibility Notes:

• Be sure to balance your optical train and accessories carefully; while the mount has high capacity, proper balance ensures optimal tracking and longevity of motors.
• Supply 12 V DC power (5 A) via the correct plug (5.5 mm/2.5 mm) as required for the head.
• If you already own 3″ or other standard dovetail plates, note the saddle supports both Losmandy‑D & Vixen.
• For full benefit of features like iPolar and advanced GoTo/autoguide, ensure your firmware and hand controller are updated.
• Tripod and counterweights are typically not included with the head‑only version; check the packaging or SKU.