ORION TELESCOPES & BINOCULARS 52588, Instruction Manual

6

Note:

 The image in the telescope will appear mirror reversed, 

i.e., reversed left to right. This is normal for refractor tele-
scopes used for astronomical observing with a standard star 
diagonal. (For terrestrial observing we recommend using an 
optional “correct image” diagonal, which will serve up a cor-
rectly oriented view.)

3.  Now that a distant target is centered in the main tele-

scope’s eyepiece, turn on the red dot finder scope by slid-
ing the power switch to ON (refer to 

Figure 13). Position 

your eye at a comfortable distance from the rear of the 
unit. Look through the round window of the finder scope 
with both eyes open to see the illuminated red dot. The 
target object should appear in the field of view somewhere 
near the red dot.

NOTE:

 This finder has two brightness settings. When the 

switch is set all the way over to the ON position, the red dot 
is brightest. But in between the OFF and ON positions is a 
middle setting in which the red dot is dim. Typically the dim 

Figure 6.

A

) 

Thread the counterweight into its receptacle.  

B)

Remove the screw and washer from the end of the shaft, then slide 
the counterweight on and secure it with the counterweight lock knob. 

axis

A

B

Figure 7

. The BX90’s equatorial mount.

Gear shaft, 

R.A.

Saddle

Pointer

Pointer

Gear shaft Declination

Declination 

setting 

circle

Right ascension 

setting circle

Slow-motion cable, Declination

Slow-motion 

cable, R.A.

Latitude scale

Latitude 

adjustment bolt

Latitude 

lock bolt

Declination

Right

ascension axis