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The 

Omegon® 150/750 EQ-4

 

Congratulations on the purchase of the new Omegon

®

 150/750 EQ-4. This advanced telescope will 

give you hours of fun, with its all optical glass lens and light gathering ability, it is the ideal 
companion for deep sky observation. With this telescope you will be able to see the craters on the 
Moon, star clusters, nebulae the Jupiter disc features and its Galilean moons and the rings of Saturn. 
We have included many accessories so it will be easy to use this telescope. 

1. Included parts 

We have included several accessories that will make the use of the telescope easier and fun, please 
take a look at the list of the parts so you can identify them in the future. 

1.

 Barlow Lens 2x. 

2, 3.

 Two eyepieces 1.25” (31.75mm); a Plössl 25mm, Plössl 6.5mm eyepiece; 

4.

 Red-dot Finderscope; 

 

2. Getting Started 

It is very simple to get started. Here is how the 
telescope works. The telescope main lens should 
point to the object being observed. The mirror 
on the back of the tube will gather the light 
coming from the object and reflects it to the 
secondary mirror that brings it to the eyepiece. 
The focuser tube moves up and down to get a 
precise focused image. At the focuser one can 
use the supplied accessories. Different accessory 
combinations give different results, such as 
different image magnifications or correct image. 
But all this will be explained in detail in the next 
pages. 
 

3. Assembly 

Start by setting the tripod. Open the tripod legs as shown (figure 2). Place the supplied accessory 
tray (figure 3). The accessory tray can be used to place the telescope accessories such as the 
eyepieces, filters etc. Next place the equatorial mount on top of the tripod (figure 4), the mount will 
bear all the weight of the telescope so it is important to thread it securely. Thread the counterweight 
shaft as shown (figure 5), it fits the threaded hole on the Right Ascension (R.A.) axis. Remove the 
foot-saver (the screw and washer – figure 6) from the shaft’s end and slide in a Counterweight. Make 
sure to use the counterweight’s locking knob so that it is securely fastened. You can leave it at half 
the shaft length for now. 
 

ATTENTION! 

Never  look  at  the  Sun  through  a 

telescope. Concentrated Sun light may cause serious 
eye  injury.  Children  should  use  only  with  adult 
supervision.

 

Figure 1. Parts List 

Summary of Contents for 150/750 EQ-4

Page 1: ...1 Instruction Manual Omegon 150 750 EQ 4 English version 12 2014 Rev A...

Page 2: ...to the secondary mirror that brings it to the eyepiece The focuser tube moves up and down to get a precise focused image At the focuser one can use the supplied accessories Different accessory combina...

Page 3: ...on each axis figure 8 These knobs allow to make small movements on both axis of the telescope Use the included thumbscrew on each Make sure they fit the slotted surface on the protruding axis shaft Op...

Page 4: ...move the two thumbscrews as shown in figure 11 and place the finderscope Make sure the finderscope figure 12 is pointing in the same direction as the telescope s aperture so when you point the telesco...

Page 5: ...you release the locking handknobs the telescope moves freely The telescope is balanced when neither the tube nor the shaft axis tilt to any side To adjust the R A axis arrow in figure 15 and rotate t...

Page 6: ...ou will be able to see a defocused star It will appear as a series of rings These are called diffraction rings and they will be important to determine how good or how bad the alignment is figure 19 If...

Page 7: ...4 vanes cross shaped and the primary mirror s holding pads figure 21 The secondary mirror can be adjusted by using the 3 screws figure 17 Releasing it can make the secondary mirror support to rotate S...

Page 8: ...e mentioned the finderscope as a valuable tool to point the telescope at an object To operate properly the telescope and the finderscope should be aligned The image obtained through the finderscope ha...

Page 9: ...2 Looking through the finderscope it should be powered on we see the same building but in this case the chimney is not centered We adjust the finderscope using the two thumbscrews so that the finders...

Page 10: ...e Telescope focal length is 750mm Pl ssl 25 eyepiece focal length is 25 mm 750 25 30 This means that the Pl ssl 25mm eyepiece provides a 30x power magnification This seems low but try it you will see...

Page 11: ...nator between illumated and dark surfaces 6 2 Jupiter is the biggest planet of our solar system It is also one of the favorite targets for beginners Galileo was able to discover that the four tiny dot...

Page 12: ...ual use It doesn t mean it can t be used for photography however it will be hard to get high quality pictures with this telescope If you have a smartphone you can shoot the Moon or some terrestrial ob...

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