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Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"
Celestron Aluminum Dew Shield with Cover Cap - 11"

Celestron Aluminum Dew Shield with Cover Cap - 11"

by Celestron
SKU CEL-94023
$259.95 - $259.95
$259.95
$259.95 - $259.95
$259.95
Price Match Policy!
  • Protects 11" Schmidt-Cassegrain, EdgeHD, and RASA corrector plates from dew
  • Rigid aluminum construction weighs 3.4 lbs and will not flex or deform
  • 17" length blocks stray light to increase image contrast
  • Velvet-lined interior absorbs moisture and stray reflections
  • Includes a 16 oz aluminum cover cap for dust protection and taking dark frames
  • Features a 1.5" x 2" cable management slot for Fastar/Hyperstar imaging setups
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Celestron Aluminum Dew Shield with Cover Cap - 11"

    The Celestron Aluminum Dew Shield extends 17" from your optical tube to prevent dew formation on your 11" Schmidt-Cassegrain, EdgeHD, or RASA telescope. This rigid, 3.4 lb shield features a 12.9" diameter custom-fit design, blocking stray light to improve contrast, and includes a dedicated 1.5" by 2" cable slot for streamlined imaging setups. A separate 16 oz aluminum cover cap is included to protect the optics from dust and simplify dark frame acquisition.

    17" Aluminum Shield for Dew Prevention and Contrast

    This dew shield's primary function is to delay the formation of dew on your Schmidt corrector plate by reducing its exposure to the cold night sky. Its 17" length creates a crucial thermal buffer, keeping the glass above the dew point for longer. The rigid aluminum tube also serves as an extended lens hood, blocking off-axis light from nearby sources, which noticeably darkens the sky background and increases contrast on faint deep-sky objects.

    3.4 lb Rigid Build with Velvet-Lined Interior

    Constructed from a solid cylinder of aluminum, this 3.4 lb dew shield provides a secure, no-flex fit that won't sag or deform. Two adjustable plastic clips ensure a snug attachment to the telescope tube. The interior is lined with black velvet, which serves a dual purpose: it absorbs any internal reflections that could reduce contrast and traps excess moisture, further managing dew.

    • Solid Construction: Unlike flexible plastic shields, the aluminum body maintains its shape and provides robust protection for the front of the telescope.
    • Secure Fit: Designed specifically for 11" Celestron tubes (post-2006 models), with cutouts for top and bottom dovetail bars.
    • Included Cover Cap: The 16 oz aluminum cap fits snugly over the front of the shield, protecting your optics from dust when not in use.

    Integrated 1.5" x 2" Cable Management Slot

    For astroimagers using a Fastar or Hyperstar system, or those using Celestron's Dew Heater Rings, managing cables is a constant challenge. This shield incorporates a 1.5" wide by 2" long slot at the base, allowing you to route power and data cables from the front of the telescope without creating light leaks or letting them hang in the optical path. This small feature streamlines your imaging setup and reduces the risk of snags during a long exposure.

  • Will the Celestron Aluminum Dew Shield fit my older 11" SCT?

    This dew shield is specifically designed for Celestron 11” EdgeHD, RASA, or Schmidt-Cassegrain telescopes manufactured after 2006. It may not fit correctly on older models due to differences in tube dimensions or dovetail placement. The 12.9" internal diameter is sized for a precise fit on modern tubes.

    Is a 3.4 lb dew shield too heavy for my Celestron mount?

    A weight of 3.4 lbs is well within the tolerance of Celestron mounts designed to carry an 11" OTA. You will need to rebalance your telescope after attaching the dew shield, typically by sliding the optical tube slightly backward in its saddle to compensate for the forward weight.

    How does this Aluminum Dew Shield compare to a flexible plastic one?

    The primary advantage is rigidity. The aluminum construction will not deform, sag into the light path, or catch wind as easily as a flexible shield. It also provides superior physical protection for the corrector lens. The included aluminum cover cap is also a significant upgrade over the simple plastic caps typically provided with flexible shields.

    Can I use the Celestron 11" Dew Shield with a solar filter?

    No, you should never attach a solar filter to the dew shield itself. Solar filters must be mounted directly and securely to the telescope's optical tube to prevent them from falling off. The dew shield should be removed entirely during solar observation.

    How does the 1.5" x 2" cable slot help with my RASA 11 imaging setup?

    When imaging with a Celestron RASA 11, the camera and its associated cables are at the front of the instrument. The integrated slot allows you to cleanly route USB and power cables from your camera down the side of the tube. This prevents cables from dangling in front of the optics and simplifies your wiring for a more reliable imaging session on objects like the Andromeda Galaxy (M31).

    Why is a cover cap for the dew shield useful?

    The 16 oz aluminum cap allows you to cover your telescope immediately after a session without removing the dew shield, protecting it from dust. For imagers, it provides a completely opaque cover that is essential for taking dark calibration frames quickly and easily, without having to move the telescope or introduce stray light.

  • Material Aluminum with plastic attachment clips, interior velvet lined
    Cover Cap Aluminum - included
    Total Weight 3.4 lbs (1.54 kg)
    Shield Dimensions 12.9" (327.66mm) diameter x 17" (431.8mm) long
    Cable Slot Dimensions 1.5" (38.1mm) wide x 2" (50.8mm) long
    Cover Cap Weight 16 oz (453.6 g)

    • Aluminum Dew Shield - 11"

      × 1

    • Aluminum Cover Cap for Dew Shield

      × 1

    • Celestron Logo Labels

      × 2

  • Celestron 2-Year Warranty