User's Manual

33
Appendix A. Technical Specifications
Mount
Center-balanced Equatorial Mount (CEM)
Payload*
31.8kg (70 lbs), exclude counterweight
Mount weight
13.6kg (30 lbs)
Payload/Mount weight ratio
2.33
Material
All metal
Latitude adjustment range
0°~ 65°
Azimuth adjustment range
± 4°
Right Ascension worm wheel
Φ151mm, 248 teeth, M=0.6, zero backlash
Declination worm wheel
Φ151mm, 248 teeth, M=0.6, zero backlash
Worm
Φ21.2mm
PEC
Permanent PEC for CEM70/CEM70G, Real-time PEC for CEM70EC
PE*
<±3.5 arcsec p-p for CEM70/CEM70G, <0.3 arcsec rms for CEM70EC
Worm period
348 sec
Counterweight shaft
Φ28, 415 mm (SS, 1.9kg)
Counterweight
9.5 kg (21 lbs)
Mount base size
Φ152mm
Motor drive
Stepper motor
Resolution
0.07 arc seconds
Slew speed
1×,2×,8×,16×,64×,128×,256×,512×,MAX(~3.5°/sec, 900X)
Power consumption
0.6A(Tracking), 0.8A(GOTO)
Power requirement
12V DC 5A
AC adapter
100V ~ 240V with 5.5mm/2.5mm DC plug (included)
Polar scope
iPolar
TM
Internal electronic polar scope
Hand Controller
Go2Nova® 8407+,212,000+ objects database, star recognition
Meridian treatment
Stop (0-10° pass), auto flip
Zero position
Automatic zero search
Park position
Horizontal, vertical, current, alt/azi input
Level indicator
Yes
Dovetail saddle
8" Losmandy D & Vixen
GPS
Yes
Autoguide port
ST-4
Communication port
USB 3.0, Wi-Fi for CEM70G, USB2.0 for CEM70
PC computer control
Yes (ASCOM)
Cable management
CEM70G: 2xDC12V (3A), 3xUSB3.0, 1xDC in/2xDC out, iPort.
1X USB3.0 input for mount, iGuider, iPolar and more
CEM70/CEM70EC: 2xDC12V (3A), 3xUSB2.0 (2 powered),
1xDC in/1xDC out, iPort
Guiding scope/camera
iGuider
TM
Built in guiding scope and camera (CEM70G only)
Aluminum carrying case
Yes
Operation temperature
-20°C ~ +40°C
Pier/tripod
Optional LiteRoc
TM
tripod or Tri-pier/Pier
Warranty
Two year limited
*These are only guidelines. Some telescopes are very long or very big for their weight and may require a larger mount.
Remember also that imaging requirements are more rigid than visual observation.
**Measured with encoder on the bench, 348 seconds.