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14 | MOON FILTER
Your telescope accessories include a moon fi lter. It provides observations of the full or light moon in
rich contrasts. The moon fi lter is screwed into the eyepiece, when required.
CAUTION: DO NOT USE THIS FILTER AS A SUN FILTER!
15 | ADJUSTING THE FINDERSCOPE
For daylight observation we recommend to use your telescope in combination with the eyepiece
H20 (45x) only. Direct the telescope to a far-distanced object and adjust a particular part of your
object (church tower, top of a tree of crane, TV antenna) in the center of your fi eld of view. Now look
through your fi nderscope which provides a reverse and up-side-down image. Open the 3 screws of
the support (4) slightly and direct the reticle of your fi nderscope towards the center of your object.
Tighten the 3 screws with care, making sure that the reticle stays in the center of the image. Your fi n-
derscope is adjusted now. It has a far larger fi eld of view then your telescope and helps you to direct
your telescope towards your desired objects which you can observe then through your telescope
with smaller fi eld of view.
CAUTION: DO NOT AIM THE SUN WITH THE FINDERSCOPE.
YOU EYES CAN BE SERIOUSLY DAMAGED.
16 | FURTHER HINTS FOR ASTRO OBSERVATIONS
Observe outdoors only, but not through a window. Train the hand movements a few times at day-
light. In case of temperature diff erences between inside and outside, the telescope must get used to
the predominant temperature in order to avoid fogging. Adopt yourself and your eyes to the dark-
ness in advance. To clean the optical surfaces make sure to use appropriate fuzz-free optical tissues.
Remove the dust with air pressure or a blow bellow. Avoid strong rubbing. We recommend studying
specializing literature on astronomy and celestial observations. Enjoy your observations with your
DÖRR Merkur 910 Telescope!
