C
ARING
FOR
YOUR
T
ELESCOPE
C
LEANING
O
PTICAL
C
OMPONENTS
A telescope is carefully aligned during construction and great care should
be taken to maintain this alignment over the life of the telescope. Cleaning
should be done as little as possible and then only with a mild soap solution
and soft, lint-free cloth. Do not rub elements when cleaning. Blot optical
components gently and allow telescope to air dry. Store telescope in its box
or in a telescope case when not in use. Do not use pure alcohol or solvents
to clean any parts of the telescope. Do not remove optical elements from
telescope as doing so may affect the alignment of optical components when
reassembled. If telescope needs realignment, contact Zhumell or another
professional.
1. Brush telescope optics with a camel hair brush or blow off dust with air
through an ear syringe (can be purchased at any pharmacy). Do not use
a commercial photographic lens cleaner.
2. Remove organic materials (e.g., fingerprints) with short gentle strokes us-
ing soft white tissue paper and a solution of three parts distilled water and
one part isopropyl alcohol. You may also add one drop of biodegradable
dish soap to one pint of the homemade solution. Do not use lotioned or
scented tissues as they could damage the optics of your telescope.
3. Wipe down the outside of your telescope with a dry cloth to remove
condensation prior to packing up your telescope. Do not wipe any of the
optical surfaces. Instead, allow the optics to dry naturally in warm indoor
air prior to packing up your telescope.
4. Protect your telescope from excessive heat (e.g., do not store your tele-
scope in a sealed car on a warm day). Excessive storage temperatures can
damage your telescope.
C
OLLIMATION
OF
YOUR
T
ELESCOPE
Periodically, you will find that it is necessary to align the optical components
of your telescope. This procedure is called collimation. Zhumell Dobsonian
telescopes come with a 1.25’’ format laser collimator to make aligning
the mirrors in your telescope easier. For optimum image quality, it is
reccommended that you collimate your telescope before each use.
1. Remove eyepiece from eyepiece holder
and insert laser collimator into eyepiece
holder. Secure the laser collimator by
tightening thumbscrew.
2. Turn thumbscrew located on the side
of the collimator to turn on the col-
limator.
3. Look through hole in side of collimator
to see where the laser is reflected onto
the reticle. If you can not see the laser
reflected back onto the reticle, align the
secondary mirror by adjusting the sec-
ondary mirror collimation screws until
the laser is reflected onto the inside of
the collimator..
4. Loosen three locking screws on bottom
of optical tube (the thin ones which
stick farther out from the back of the
mirror).
5. Align laser to center of reticle by adjust-
ing the three primary mirror adjustment
screws (the thick screws in the back of
the mirror). Do not over turn these
screws (max of 1⁄4 turn at a time).
6. Tighten the three locking screws on
bottom of optical tube to lock the pri-
mary mirror into place.
2
3
6
5
P
ROPERLY
A
LIGNED
Содержание Dobsonian
Страница 1: ...DOBSONIAN TELESCOPES...
