Protecting your Telescope Lenses from Dust

Dust is present everywhere around us.  It is only natural that sooner or later your telescope will be coated with a layer of dust.  While a thin layer of dust will not probably interfere with your image.  A thicker layer can affect your image.  Hence, it is essential that the telescope lens is protected from dust.

Telescopes are provided with covers.  Always fit the covers over the lenses when you are not using them.  Some astronomy shops provide compressed air to clean the lenses.

Never touch the surface of the lens with your bare hands.  The oils in skin can affect the coating on the glass.  Never blow into the lens, droplets of saliva can get deposited on the surface and damage the lens.