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rings and clamp the two knobs. Slide the tube 
so that the focuser is pointing up and is more or 
less centred. Depending on the telescope tube 
weight you might find useful to use two 
counterweights. The finderscope is placed next 
to the focuser, remove 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 
telescope to an object you also point the 
finderscope to it. 

Figure 7. Place the tube rings. 

Figure 8. Place fine adjustment knobs. 

Figure 9. Slide tube and thread the ring knobs. 

Figure 10. Finderscope thumbscrews. 

Figure 11. Remove the finderscope thumbscrews. 

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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