Bresser DISCOVERY ADVENTURES 50 MM Instrucciones De Uso página 9

it is time to replace the battery, remove the battery cap by loosening the set screw. Take out the old
battery and slide a new battery in place with the positive side showing. Replace the cap, and tighten
the set screw.
For the viewfinder to be effective, it must be aligned. To do this:
• Insert the 20mm eyepiece into the Zenith mirror (diagonal) and power on the viewfinder by sliding the
switch on its right side to an "On" position.
• Point the eyepiece at an easy to identify target. Center the object in the eyepiece. Lock the telescope
into place by tightening the panhandle.
• Without moving the telescope, position the red dot using the two adjustment screws so that it shares
the same view as the one in your eyepiece. The front screw will move the viewfinder up and down,
and the other will move it side to side. Your viewfinder is now aligned.
Note: To preserve battery life, don't forget to turn off the viewfinder after use.
Using your telescope
Use the panhandle (13) to move the scope up, down and side to side until your target comes into view
in the eyepiece. It is important to remember that the rotation of the Earth means objects will move out
of your eyepiece fairly quickly. Once you have found and focused on your desired target, you will have
to track the object as it journeys across the night sky. For a closer look at an object, you can insert the
12.5mm eyepiece. The magnification will increase from 30x to 48x.
Which eyepiece is right?
It is important that you always choose an eyepiece with the highest focal width at the beginning of your
observation. Afterward, you can gradually move to eyepieces with smaller focal widths. The focal width
is indicated in millimetres and is written on each eyepiece. In general, the following is true: the larger
the focal width of an eyepiece, the smaller the magnification. There is a simple formula for calculating
the magnification:
Focal width of the telescope tube : Focal width of the eyepiece = Magnification
The magnification also depends on the focal width of the telescope tube. This telescope contains a
tube with a focal width of 600 mm.
Examples:
600 mm / 20 mm = 30X magnification
600 mm / 12.5 mm = 48X magnification
Focus wheel
Look through the telescope eyepiece (3) and hone in on a far away object that you can see well (for
instance, a church tower). Focus in on the object with the focus knob (1) in the way shown in Fig. 3.
Technical data:
• Design: achromatic
• Focal length: 600 mm
• Objective diameter: 50 mm
Notes on cleaning
• Clean the eyepieces and lenses only with a soft, lint-free cloth, like a microfibre cloth. To avoid
scratching the lenses, use only gentle pressure with the cleaning cloth.
• To remove more stubborn dirt, moisten the cleaning cloth with an eyeglass-cleaning solution, and
wipe the lenses gently.
• Protect the device from dust and moisture. After use, particularly in high humidity, let the device
acclimatise for a short period of time, so that the residual moisture can dissipate before storing.
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