5
Astronomical Use:
1) Always start viewing with your 25mm. eyepiece. This is your low power eyepiece
and its wide viewing field will make it easier to locate objects. By the way, you will
notice that stars, when seen through your telescope, still look like points of light. This
is because they are so far away. Even the largest telescopes show stars only as
bright points.
2) Once you have located an object and the view is clear you may wish to change to
the high power eyepiece. You will notice that your object looks bigger, but not as
bright as seen with the 25mm. eyepiece. This is normal. If the viewing conditions are
not good the high power image may not appear sharp or stable. If this happens,
switch back to the 25mm. eyepiece and try the high power eyepiece another night.
You can also achieve higher power by inserting the 3X Barlow lens between the
telescope and either eyepiece. This triples the available power.
Care and Cleaning of Optics
Warning:
Improper cleaning of optical components may void the warranty.
Optical components of a telescope will over time get dirty. The amount of dirt and or
dust collected onto a lens or mirror should only be removed with the utmost care
and this is at times best left to people with experience in this procedure. A
considerable amount of dirt or dust must be present on the optical surface before
one will notice the effect visually.
1.
Keeping the dust caps on during storage of the telescope will reduce the
amount of dust collected.
2
After using the telescope there might be dew condensation, on the optical
surfaces. When the telescope is brought inside remove the dust caps and al
low the moisture to evaporate naturally. Point the telescope downwards so as
to minimize the collection of airborne dust.
3.
Once the moisture is gone then replace the dust caps.
4.
If you wish to remove dust from the lenses or mirrors you first should try using
a can of filtered compressed air. Remove the dust cap and the dew shield in
the case of the refractor style of telescope, or take the mirror cell out of the
reflecting type. Once you are able to freely blow across the surface of the
optics then begin by first pointing the can away from the piece and gently
expel some air. This will remove any condensate in the air can lines and clear
off dust that may have accumulated on the discharge tube. Next using short
quick bursts of air carefully remove the dust particles. DO NOT HOLD THE
TRIGGER OF THE COMPRESSED AIR FOR TOO LONG AS
CONDENSATE MIGHT BE BLOWN OUT ACROSS THE OPTICAL
SURFACE. If particles still remain after several attempts at removal than the
telescope should probably be taken back to the dealer for cleaning.