NPZ TAL-75R, Инструкция по эксплуатации

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7
In order to keep the telescope in good operating condition it is
necessary to check it’s technical state and fulfil maintenance.
Keep the telescope clean and protect it against physical damage
to provide no-failure operation of the telescope.
Periodically wipe off the dust from the metal surfaces with clean
soft napkins, then wipe them by the napkin wet with acid-free
Vaseline and dry with napkin.
Wipe the objective’s and eyepiece’s lenses with a dry linen napkin.
To remove oil spots use a cotton wad wet with alcohol.
Conduct the cleaning of the diagonal mirror surface without
pressure by cotton wad wet with ether, having removed all the
dust by a soft lens brush first to avoid thin scratches.
In idle position the telescope tube should be permanently closed
with lid and the eyepiece tube – with plug.
Cleaning of the telescope optical components requires caution and
accuracy. Perform it only in case of emergency.
Optics self-cleaning and disassembling of the telescope are
permitted ONLY after the warranty period.
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Maintenance