iOptron GEM28 User Manual

14
Figure 14. Install counterweight
Step 7. Install telescope
CEM26 has a 3.5” Vixen dovetail saddle, with a Center Adjusting Block. This can be used to
accommodate dovetail bars with different width and keep the OTA centered. Release the locking screws
(blue circled) on the Center Adjusting Bar first. Adjust the setting screws (red circled) to move the center
block in or out. Then tighten the locking screws. Tighten the set screws at last.
Figure 15. CEM26 Vixen dovetail saddle with Center Adjusting Block
To mount a telescope on to the mount, release the dovetail Saddle Locking Knob and slide the
telescope dovetail plate into the saddle. Tighten the Saddle Locking Knob.
There are two threaded holes on the side of the dovetail saddle for mounting an iOptron mini
autoguiding system, iGuider.
Figure 16. iGuider mini-autoguiding system
Saddle Locking Knob
Center Adjusting Block

iOptron GEM28 Specifications

General

Payload Capacity	28 lbs (12.7 kg)
Mount Weight	10.4 lbs (4.7 kg)
RA Worm Gear Material	Brass
DEC Worm Gear Material	Brass
Tracking Rate	Sidereal, Lunar, Solar
Autoguiding Port	Yes
Communication Port	USB
Tracking Accuracy	± 5 arcsec
Weight	10.4 lbs (4.7 kg)
Mount Type	Equatorial
RA Worm Wheel	180 teeth
DEC Worm Wheel	180 teeth
Motor Drive	Stepper motor
Power Requirement	12V DC
GPS	Built-in
Polar Scope	Yes, included
Counterweight Shaft	Ø20 mm
Worm Gear Period	600 seconds