© 2023 Baader Planetarium GmbH
29
Cleaning and Maintenance
In general, the principle "less is more" applies to the cleaning of all optics!
The lens system of the telecentric system
usually doesn't need much care. An
occasional cleaning is all that is needed – and all the less often if the optics are stored
carefully with the dust caps on.
Over time, dust may accumulate on the outer lenses. Great care is required to avoid
damaging the optics. If dust has settled on the lens, remove it with a camel hair brush
or with compressed air from a pair of bellows – do not use compressed air from a can,
as that may contain additives. Blow on the lens at a shallow angle for a few seconds.
For further removal of stuck dirt, use Optical Wonder Fluid from Baader Planetarium
and a soft cloth (Kleenex (!) – no other brand!) to remove any remaining residue.
Wipe from the centre of the lens outwards. Do not rub in circles! Never spray the
cleaning fluid onto the lens! Otherwise liquid could flow between the lenses. Put the
liquid on a cloth and then
treat the lens with the cloth.
Occasionally, dew con-
denses on a lens, especially
when it is brought into a
warm room. Then do not
cover the lens until the
moisture has evaporated.
After a night of observa-
tion, always inspect the
telescope the next day to see
if any residual moisture has remained on the optical surfaces. If necessary, allow the
telescope to air open and only then close it dust-tight again.
The H-alpha-Filter must not be cleaned mechanically!
For cleaning, you must only use a pair of bellows – never use compressed air from a
can! You must never attempt to clean the H-alpha-filter mechanically by swiping or
rubbing.
TM
WONDER
OPTICAL
#2905009
Optical Wonder
TM
Set
Cleaning Fluid (100 ml) and
Microfiber Cloth (25x25 cm)
www .baader-planetarium .com/optical-wonder
Attention: The H-alpha filter is sensitive to frost and
must
not be
stored below 0 °C . It may be used at temperatures down to -10 °C
as long as the heating element is active; we recommend to insulate
the filter at cold temperatures .
