Description
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| Feature |
Specification |
| Mount Type |
German Equatorial |
| RA Encoder |
High-Resolution Encoder w/ RPEC |
| Payload Capacity |
28 lbs (12.7 kg) |
| Mount Head Weight |
10 lbs (4.5 kg) |
| Periodic Error |
< 0.3 arcseconds RMS |
| RA/DEC Gear Diameter |
88mm |
| Gear Teeth |
144 |
| Worm Gear |
Brass |
| RA/DEC Shaft Diameter |
35mm |
| Step Resolution |
0.17 arcsec/step |
| Slew Speed |
~4/sec max |
| Polar Alignment |
iPolar Electronic Polar Scope |
| Latitude Range |
10 70 |
| Azimuth Adjustment |
6 |
| Tripod |
LiteRoc 1.75″ Stainless Steel |
| Dovetail Saddle |
Vixen-Style |
| Autoguide Port |
ST-4 compatible |
| Controller |
GoToNova 8409, 8-line LCD, heated |
| Object Database |
212,000+ objects |
| Connectivity |
RS232, USB, Wi-Fi (built-in) |
| Power Input |
12VDC (AC adapter included) |
| Operating Temp |
-20C to +40C |
| Carry Case |
Included (padded, hard-sided) |
| Warranty |
Two-year limited |
Observing Tip:
The GEM28EC is capable enough to anchor a small observatory, but nimble enough to take on the road. For imaging trips, pack a small refractor and dedicated astro camera with the iGuider systemyoull have a fully portable, encoder-corrected rig that rivals larger systems in precision and ease of use. Dont forget a compact 12V battery or power tank for true go-anywhere performance.
Tech Details:
| Mount |
German Equatorial Mount |
| Payload * |
28 lbs (12.7kg), exclude counterweight |
| Mount weight |
10 lbs (4.5kg) |
| Payload/Mount weight |
2.80 |
| Structure Material |
All metal, Casting + CNC machined |
| Exterior Finish |
Powder coating |
| Periodic error (PE) ** |
< 0.3 arcsec rms |
| PEC |
Real-time PEC |
| Worm period |
600 sec |
| Right Ascension worm wheel |
88mm, 144 teeth aluminum |
| Declination worm wheel |
88mm, 144 teeth aluminum |
| Right Ascension axis shaft |
35mm steel |
| Declination axis shaft |
35mm steel |
| Right Ascension bearing |
55mm ball bearing |
| Declination bearing |
55mm ball bearing |
| Worm gears |
15.2mm, Brass |
| Motor drive |
1.8 stepper motor, 128X microdivision |
| Resolution |
0.17 arc seconds |
| Transmission |
Synchronous belt |
| Latitude adjustment range |
10 ~ 70 |
| Azimuth adjustment range |
6 |
| Polar Scope |
iPolarTMelectronic polar scope |
| Level indicator |
Level bubble |
| Hand Controller |
Go2Nova 8409 with ~212,000 objects database |
| Tracking |
Automatic |
| Slew speed |
1,2,8,16,64,128,256,512,MAX(6/sec) |
| Power consumption |
0.6A(Tracking), 0.9A(GOTO) |
| Power requiremention |
12V DC, 5A |
| AC adapter |
100V ~ 240V (included) |
| Power-down memory |
Yes |
| Wi-Fi |
Built-in |
| Communication port |
Yes (Wi-Fi and USB) |
| Autoguide port |
Yes (ST-4 compatible) |
| Firmware upgrade |
Yes |
| PC computer control |
Yes (ASCOM) |
| Counterweight shaft |
20X200mm (M16), Stainless Steel |
| Shaft extension |
20X120mm (M16), Stainless Steel |
| Counterweight |
10 lbs (4.5kg) |
| Tripod |
LiteRoc heavy-duty stainless steel tripod (7.5kg) |
| Dovetail saddle |
3.8″ Vixen-style, center adjustable |
| Carrying case |
Included |
| GPS |
Optional external 32-channel GPS |
| Autoguiding |
Optional external iGuider 1 |
| Operation temperature |
-10C ~ 40C |
| Warranty |
Two year limited |
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