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SkyGlow Broadband Filter - 2 Orion
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Meade Telescopes



Cleaning & Storage for Meade Telescopes ETX Series



Caring for the Meade ETX Line of Telescopes



Note: These care instructions were written with the ETX-90EC Meade telescopes in mind, but they work perfectly well for any Meade ETX-model telescope.

The Meade telescopes ETX-90EC is a precision optical instrument designed to yield a lifetime of rewarding applications. Given the care and respect due any precision instrument, the ETX-90EC will rarely, if ever, require factory servicing or maintenance. Continued: Maintenance guidelines for Meade telescopes ETX-models include:
  • If the Meade telescopes ETX-90EC is not to be used for an extended period, perhaps for one month or more, it is advisable to remove the eight AA-size batteries from inside the drive base. Batteries left installed for prolonged periods may leak, causing damage to the telescope's electronic circuitry
  • The super-gloss anodized finish of the Meade telescopes ETX-90EC's deep-violet optical tube fades if left in direct sunlight for prolonged periods.
  • Do not leave the Meade telescopes ETX-90EC telescope outdoors on a warm day or inside a sealed car for an extended period of time; excessive ambient temperatures can damage the telescope's internal lubrication and electronic circuitry.
  • A set of two (English-format) hex wrenches is provided with each ETX-90EC Astro Telescope. These wrenches are used as follows: Small wrench (.05"): Use the small wrench to tighten the set-screws of any knobs which may loosen (e.g., the focus knob or flip-mirror control knob).

    Medium wrench (1/16"): This wrench is used to detach the viewfinder bracket from the telescope's rear-cell.



If you feel uncomfortable cleaning your own telescope, OPT is here to help. We have a factory-trained telescope technican on our staff that can clean, collimate, or (if necessary) repair your ETX. Call us for pricing and details.

Storage and Transport



When not in use, store the Meade telescopes in a cool, dry place. Do not expose the instrument to excessive heat or moisture. It is best to store the telescope in its original box with the vertical and horizontal locks (6 and 10, Fig. 1 in your manual) in the unlocked positions. If shipping the telescope, use the original box and packing material to protect the telescope during shipment.

When transporting the Meade telescopes, take care not to bump or drop the instrument; this type of abuse can damage the optical tube and/or the objective lens. It is highly recommended to use a carry case when transporting the telescope.