Zhumell Dobsonian, User Manual

U

SING

YOUR

 T

ELESCOPE

I

NSTALLING

/R

EMOVING

 2“ E

YEPIECES

1.  Loosen the two thumbscrews that 

hold the 1.25’’ adapter in the fo-

cuser.

2.  Slide adapter out of focuser.

3.  Remove covers from 2’’ format 

eyepiece.

4.  Slide chrome end of eyepiece into 

focuser.

5.  Tighten thumbscrews to hold eye-

piece in place. 

6.  View through eyepiece and focus as 

needed.

7.  Loosen the thumbscrews.

8.  Remove the eyepiece from the 

holder.

9.  Replace covers on eyepiece for stor-

age.

2

4

F

OCUSING

THE

 I

MAGE

Zhumell Dobsonian Telescopes feature a high-quality Crayford focuser which 

allows the viewer to achieve a rough focus quickly by pushing or pulling the 

focus tube and fine focusing of the image using the focus knobs. 

1.  Insert an eyepiece into the 

eyepiece holder.

2.  View through eyepiece while 

focusing.

3.  Loosen both thumbscrews (be-

low focus knobs) on focuser.

4.  Push or pull focuser gently 

until image becomes as clear as 

possible.

5.  Tighten the thumbscrew that is 

furthest from the optical tube 

(outer).

6.  Adjust rack-and-pinion knob to 

improve focus.

7.  Tighten the thumbscrew near-

est to the optical tube (inner), 

to lock in place.

3

4

6

7

Both Tight

(Fully Locked)

Focuser Barrel and 
Knobs Locked

Both Loose

(Full Focus)

Focuser Barrel and 
Knobs Move

Only Inner Loose

(Coarse Focus Only)

Focuser Barrel 
Moves, Knobs 
Locked

Only Outer Loose

(Fine Focus Only)

Focuser Knobs 
Move, Barrel 
Locked

F

OCUSER

 S

ETTINGS