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Note the two locking handknobs (fgure 13). 
When released they work as clutches and allow 
free movement in both axis. When fully 
tightened you can use the fine adjustment knobs 
(figure 8). For easy operation the telescope still 
needs to be balanced. Adjust the counterweights 
(figure 14) so that when 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 the altitude 
handknob (circle in figure 15). When ready lock 
again. To adjust the azimuth use the two side 
hand knobs as shown in figure 16.

Figure 12. Place finderscope. 

Figure 13. Locking handknobs. 

Figure 14. Balance the telescope. 

Figure 15. Adjust the altitude axis. 

Figure 16. Adjust the azimuth axis. 

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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