Orion starBlast 4.5 EQ User Manual

2
Figure 1a.
The StarBlast 4.5 EQ
EZ Finder II reflex sight
Eyepiece
Focuser
Tube rings
Optical tube
Primary mirror cell
Declination slow-motion control
Right ascension slow-motion control
Latitude adjustment T-bolt
Azimuth lock knob
Accessory tray
Declination setting circle
Right ascension setting circle
Counterweight lock knob
Counterweight
Counterweight shaft
Accessory tray
bracket
Leg lock knob
Figure 1b. The StarBlast 4.5’s equatorial mount.
Right ascension
lock knob
Right ascension
setting circle
Latitude scale
Latitude lock T-bolt
Latitude adjustment
T-bolt
Declination lock knob
Declination
setting circle
Azimuth lock knob
Right
Ascension
(R.A.) axis
Declination (Dec.) axis
Right
Ascension
(R.A.) axis
Declination (Dec.) axis

Orion starBlast 4.5 EQ Specifications

Optical Specifications

primary mirror diameter	4.5" (114mm)
effective focal length	450mm
focal ratio	f/3.9
minor axis of secondary mirror	1.3" (34mm)
mirror coatings	Aluminum with silicon dioxide (SiO2) overcoat

Eyepiece Specifications

focuser type	Rack-and-pinion
eyepiece size	1.25"
eyepiece magnification with 15mm eyepiece	30x
eyepiece magnification with 6mm eyepiece	75x
eyepiece coatings	Fully coated with multi-coatings

Physical Specifications

finder scope	EZ Finder II reflex sight
mount type	EQ-1, German equatorial
tripod material	Aluminum
total instrument weight	17 lbs