iOptron GEM28 1.5 - Compact Power with iPolar Precision
The iOptron GEM28 1.5″ is designed to make your observing experience simple, accurate and mobile. Whether you are just starting out or already experienced in astrophotography, this GoTo mount offers the perfect balance of portability and performance.
Lightweight and powerful
The GEM28 can carry telescopes up to 12.7 kg, while he himself was only 4.5 kg weighs. That means you can easily take it with you to dark locations without lugging around heavy equipment. Thanks to the smart 2:8 weight ratio it remains stable even in heavier setups - ideal for sharp images even during long exposures.
Smart alignment with iPolar
The built-in iPolar electronic polar finder makes alignment easy and fast. Even if the North Star is not visible, the Easy Polar Alignment function you to align perfectly. Within minutes, you'll be ready to explore the night sky or take photos with razor-sharp tracking.
Accurate tracking and error correction
The GEM28 1.5 offers high-precision tracking, with a periodic error less than ±10 arcseconds. Thanks to the permanent PEC correction the system learns your movements and automatically corrects small deviations. This keeps stars perfectly in focus - even at longer exposure times.
Smart technology at your fingertips
With the powerful Go2Nova® technology and a database of more than 212,000 celestial objects navigate effortlessly through the night sky. The hand controller with bright LCD screen is easy to operate, even with gloves on.
Prefer to work wirelessly? The built-in WiFi system lets you control the mount via smartphone, tablet or laptop. That way you have everything under control, without cable clutter.
Solidly built, ready for outdoors
The CNC-machined metal construction feels solid and provides stability for any observation session. The included 1.5″ stainless steel tripod is light but sturdy, with a cast steel spreader and accessory holder. Perfect for travel, field work or just the backyard.
The GEM28 1.5 is designed to make your nights easier, smarter and more accurate - a reliable partner for years of observations.
What we recommend
✓ Visual observation - excellent fit
✓ Astrophotography - ideal for mobile setups
✓ Beginners & advanced users - intuitive operation
✗ Permanent setup - better suited for mobile use
Specifications
General
| Feature | Description |
|---|---|
| Series | GEM28 |
| Type of mount | Equatorial (GoTo) |
| Carrying capacity | 12.7 kg |
| Own weight | 4.5 kg |
| Total weight | 20 kg |
| Color | Black and red |
Controls & Functionality
| Feature | Description |
|---|---|
| Operating System | Go2Nova® |
| Database | 212,000 objects |
| Hand controller | Backlit LCD |
| WiFi | Built-in |
| Alignment | 1-, 2- or 3-star alignment |
| PEC correction | Permanent |
| Autoguiding port | ST-4 compatible |
| Computer connection | USB |
| Firmware update | Via USB |
Mechanical
| Feature | Description |
|---|---|
| Drive | Wormwheel |
| Worm Material | Aluminum |
| Worm Gear Equipment | Brass (144 teeth) |
| Latitude range | 10°-70° |
| Counterpoint | 1 × 4.5 kg |
| Counterweight bar | 20 mm steel |
| Dovetail clamp | Vixen-compatible |
Tripod
| Feature | Description |
|---|---|
| Type | 1.5″ stainless steel tripod |
| Weight | 5 kg |
| Spreader | Cast steel with accessory holder |
Electronics & Power
| Feature | Description |
|---|---|
| Nutrition | 12V DC, 5A |
| Power consumption | 0,9 A |
| Operating temperature | -10°C to +40°C |
Optional
| Accessory | Description |
|---|---|
| GPS | 32-channel module |
| iGuider | Autoguidance system |
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