Omegon Dobson Advanced 203 Instruction Manual Download | Manualshive

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Instructions Manual

Omegon® Dobson Advanced 203

English version 10.2015 Rev A

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Summary of Contents for Dobson Advanced 203

Page 1: ...1 Instructions Manual Omegon Dobson Advanced 203 English version 10 2015 Rev A ...

Page 2: ...2 Getting Started The telescope is supplied with two boxes marked OTA 1 2 and Base 2 2 Each containing the optical tube and the Dobson base respectively Start by opening the smaller flat box should be marked Base 2 2 Remove the wooden panels the tools and accessories Place them on a flat and soft surface we recommend carpeted floor to avoid scratches 3 Assembly Start by setting the side panels and...

Page 3: ...Assemble top base s disc Pay attention to the right side Figure 4 Tighten the parts using the supplied allen wrench Figure 5 Base is ready to receive base s bottom disc Figure 6 Rubber feet should point out Figure 7 Use supplied nut wrenches to tightent ...

Page 4: ...4 Figure 8 Shaft placement sequence is important Figure 9 Tighten telescope s side bearings cylinders Figure 10 Balance the R A axis with counterweight Figure 10 Side disc for balance adjustment ...

Page 5: ...at head screws firmly Place the tube on the base fig 12 The tube should now tilt freely 4 What is the Balance Adjustment System and how to use it The balancing system is only required when the optical tube is out of balance tilts either to the front or the back and additional friction is required Using a heavier eyepiece for example may tilt the telescope tube to the front On the surface of the le...

Page 6: ...The plastic tip should be touching the recess at is lowest position Jittering may occur if the knob is not properly aligned with the recess Take your time to adjust the knobs up down position for optimal performance Tighten the hand knob firmly to get more friction Unthread the hand knob by 3 turns to remove the optical tube from the base Figure 2 Figure 3 Figure 14 The Balancing System Figure 15 ...

Page 7: ...ages To install the focuser release the two set screws as shown in figure 17 and insert the focuser base tube Make sure the base tube fits the focuser base The set screws should now be retightened to hold secure the focuser 5 2 Finderscope The finderscope is also an essential part of your telescope as it helps to locate the objects to be observed through the telescope s eyepiece There are two main...

Page 8: ...inator between illuminated 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 dots that turn around the planet were in fact part of Jupiters system of moons With this telescope you will not only be able to see Jupiter s planet disc with its two major discernible bands but also ...

Page 9: ...ve an example for our telescope and the eyepiece from the example above Telescope s focal length is 1200mm Eyepiece s focal length is 20mm 1200𝑚𝑚 20𝑚𝑚 60 𝑝𝑜𝑤𝑒𝑟 This means that the 20mm eyepiece provides a 60x power magnification This seems low but when you try it you will see a bright image with some very good details 7 2 Barlow Lens not included The barlow lens is a very interesting device It is ...

Page 10: ...stic protection should be completely removed and discarded Turn power on by rotating the potentiometer to its ON position as shown in figure 3 you will hear a click when ON rotate all the way to get maximum power When powered the red dot point on the red dot case 1 figure1 lights up figure 4 and figure 5 A small red point is projected to the optical window 3 figure 1 This red point when aligned wi...

Page 11: ... text images and labels are property of Nimax Gmbh Figure 4 Red dot lights up when ON Figure 5 A red dot is projected to the optical window Figure 6 Turn azimuth adjustment knob to align finder Figure 7 Turn altitude adjustment knob to align finder Figure 8 Turn potentiometer OFF Figure 9 Place finderscope and eyepiece at the telescope ...

Page 12: ...agnification possible so we have the widest field of view 3 2 Looking through the finderscope it should be powered ON we see the same building but in this case the red dot and chimney are not centered We adjust the finderscope using the two altitude and azimuth knobs so that the finderscope red point moves slightly until it matches the chimney This is enough to correct the objects position in the ...

Page 13: ... it no longer can be seen The battery needs to be replaced Turn the potentiometer OFF Now remove the battery cap and the battery from the battery compartment and replace with a new battery figure 9 and 10 Make sure the battery clip has solid contact with the battery base Place the plastic battery cap back to protect the battery Turn the potentiometer ON and check if the red dot is brighter now Whe...

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