Red Dot Finder Assembly (Optional); Eyepiece Assembly; Operating Your Telescope; Aligning The Fi Nderscope - Dörr DANUBIA DELTA 20 Notice D'utilisation

06.4

RED DOT FINDER ASSEMBLY (OPTIONAL)

Attaching the Red Dot Finder (Fig.25)
Slide the red dot finder bracket into the rectangular slot and tighten the screw to hold the red dot finder in
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place (DÖRR-No. 566310)
06.5

EYEPIECE ASSEMBLY

Inserting eyepiece into refl ector (Fig.26)
Unscrew the thumbscrews on the end of the focus tube to remove the black plastic end-cap.
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Insert the desired eyepiece then re-tighten thumb screws to hold the eyepiece in place.
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Inserting eyepiece into refractor (Fig.27)
Loosen the thumbscrews on the end of the focus tube.
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Insert the diagonal into the focus tube and re-tighten the thumbscrews to hold the diagonal in place.
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Loosen the thumbscrews on the diagonal.
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Insert the desired eyepiece into diagonal and secure by re-tightening thumbscrews.
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07 | OPERATING YOUR TELESCOPE

07.1 ALIGNING THE FINDERSCOPE
These fi xed magnifi cation scopes mounted on the optical tube are very useful accessories. When they are
correctly aligned with the telescope, objects can be quickly located and brought to the centre of the fi eld.
Alignment is best done outdoors in day light when it's easier to locate objects. If it is necessary to refocus
your fi nderscope, sight on an object that is at least 500 yards (metres) away.
For 5x24 finderscope: twist the end of the finderscope until focus is reached (Fig.a).
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For 6x30 finderscope: loosen the locking ring by unscrewing it back towards the bracket. The front lens
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holder can now be turned in and out to focus. When focus is reached, lock it in position with the locking
ring (Fig.a1).
1. Choose a distant object that is at least 500 yards away and point the main telescope at the object. Adjust
the telescope so that the object is in the centre of the view in your eyepiece.
2. Check the fi nderscope to see if the object centred in the main telescope view is centred on the crosshairs.
3. For the 5x24 fi nderscope, use the three alignment screws to centre the fi nderscope crosshairs on the object
(Fig.a2). For the 6x30 fi nderscope with spring loading, adjust only the two small screws (Fig.a3).
07.2

USING THE RED DOT FINDER (OPTIONAL)

The Red Dot Finder is a zero magnifi cation pointing tool that uses a coated glass window to superimpose the
image of a small red dot onto the night sky. The Red Dot Finder is equipped with a variable brightness control,
azimuth adjustment control, and altitude adjustment control (Fig.b). The Red Dot Finder is powered by a 3-volt
lithium battery located underneath at the front. To use the Finder, simply look through the sight tube and move
your telescope until the red dot merges with the object. Make sure to keep both eyes open when sighting.
Aligning the Red Dot Finder
Like all fi nderscopes, the Red Dot Finder must be properly aligned with the main
telescope before use. This is a simple process using the azimuth and altitude control knobs.
Open the battery cover by pulling it down (you can gently pry at the 2 small slots) and remove the plastic
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shipping cover over the battery (Fig.b1).
Turn on the Red Dot Finder by rotating the variable brightness control clockwise until you hear a "click".
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Continue rotating the control knob to increase the brightness level.
Insert a low power eyepiece into the telescope's focuser. Locate a bright object and position the telescope
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so that the object is in the centre of the field of view. With both eyes open, look through the sight tube at the
object. If the red dot overlaps the object, your Red Dot Finder is perfectly aligned. If not, turn its azimuth and
altitude adjustment controls until the red dot is merged with the object.
Fig.b
Altitude
adjustment
control
Fig.b1
18
Fig.a Fig.a1
Fig.a2
Fig.a3
Azimuth
Sight Tube
adjustment
ON/OFF
control
brightness
control
battery cover
Plastic shipping
cover