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Telegizmos Cover for Refractor on ALT/AZ or EQ Mount

Telegizmos Cover for Refractor on ALT/AZ or EQ Mount

by Telegizmos
SKU TG-TGR2
CA$70.00 - CA$118.00
CA$70.00
CA$70.00 - CA$118.00
CA$70.00
Price Match Policy!
  • Six sizes for refractors from the Coronado PST to 6" refractors, tube lengths up to 58"
  • Multi-layer polyethylene with a fully aluminized surface
  • Reflects solar radiation to keep telescope cool
  • Waterproof with double lap sewn seams
  • Built-in drawstring for a secure fit
  • For temporary outdoor storage; 365 Series for more than 1-2 weeks outdoors
1 in stock
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Telegizmos Cover for Refractor on ALT/AZ or EQ Mount

    The Telegizmos Standard Cover for Refractors provides essential protection for temporary outdoor storage, using a multi-layer polyethylene material to shield your instrument from dew, rain, and solar radiation. With six available sizes, these covers fit refractors with tube lengths up to 58 inches on a variety of Alt-Az and German Equatorial Mounts. The material's aluminized surface reflects sunlight to reduce heat buildup, while the entire package is backed by a 1-year warranty on materials and craftsmanship.

    NASA-Developed Radiant Barrier Material

    The Telegizmos cover is constructed from a proprietary solar radiant barrier material, not Mylar, originally developed for NASA as an insulator in spacecraft. It consists of multiple layers of polyethylene with an embedded fibrous webbing for tear and puncture resistance and a fully aluminized, highly reflective surface. The material is waterproof. This structure serves as an effective radiant barrier, significantly reducing the temperature of a telescope left in the sun and shortening cool-down times for evening observing. The seams are double lap sewn for strength.

    6 Sizes for Refractor Tubes up to 58"

    Choosing the correct cover is based on your telescope's tube length and mount size. This series offers a range of fits, from the TGR2 for the Coronado PST and short-tube 60-70 mm refractors with tubes up to 16" long, to the TGR6 and TGR6-L for 6" refractors with tube lengths up to 58". For German Equatorial Mounts, the TGR6 and TGR6-L models also specify a vertical cover length of 48" and 60" respectively, measured from the end of the scope dew shield down to the end of the counterweight shaft with the scope parked parallel to the polar axis.

    • Built-in Drawstring: Each cover has a built-in drawstring to fasten it securely to your scope.
    • Made in the USA: All Telegizmos covers are made in TeleGizmos' own shop in Texas, USA.

    Temporary Outdoor Use

    The Standard series cover is designed for temporary outside storage, not more than occasional, short-term exposure; for more than 1 to 2 weeks of continuous outdoor exposure, choose the 365 Series. It protects against rain and dew. While the material is waterproof, it's important to note that condensation can still form underneath any cover during large temperature swings or in very humid conditions.

    Telegizmos Standard vs. 365 Series Covers

    Telegizmos produces two distinct lines of covers, and choosing the right one depends entirely on your storage plans. The key difference is the intended duration of outdoor exposure.

    • Standard Series (This Product): For temporary outside storage and occasional, short-term outdoor exposure.
    • 365 Series: Designed for continuous, 24/7, year-round outdoor exposure. The 365 covers pair an outer acrylic-coated woven polyester layer with an inner solar-material radiant barrier liner. For more than 1 to 2 weeks of continuous outdoor exposure, choose the 365 Series.

  • How do I choose the right size Telegizmos cover for my 4" refractor on an EQ mount?

    The TGR4 is listed for 4" refractors on alt-az or mid-size German equatorial mounts with tube lengths up to 30". Compare your tube length with the stated cover sizes; for a longer tube, see the TGR5 (up to 45").

    Is the Telegizmos Standard cover fully waterproof?

    Yes, the material itself is waterproof, protecting your equipment from rain and dew. The seams are double lap sewn for strength.

    Can I leave my telescope outside permanently with this Telegizmos cover?

    No. The Telegizmos Standard cover is recommended only for temporary outside storage. For long-term outdoor use, more than 1 to 2 weeks of continuous exposure, you must use a cover from the Telegizmos 365 Series, which is specifically designed and warranted for 24/7 exposure.

    How does the Telegizmos cover protect my telescope from heat?

    The cover's material has a fully aluminized surface that acts as a radiant barrier. It is highly reflective, which keeps the telescope assembly significantly cooler than it would be if exposed directly to sunlight. This helps shorten the thermal cool-down time needed before you can begin observing in the evening.

    How do I measure the "vertical cover length" for my TGR6-L cover?

    This measurement applies to the TGR6 and TGR6-L. First, park your telescope so the optical tube is parallel to the polar axis. Then, measure the vertical distance from the very front edge of your telescope's dew shield straight down to the bottom end of the counterweight shaft. The TGR6-L is for set-ups requiring 60" of vertical cover length, the TGR6 for those requiring 48".

    What material is the Telegizmos Standard cover made from?

    It is made from a proprietary multi-layer polyethylene material with an embedded fibrous webbing for strength and a fully aluminized surface for heat reflection. It is light, strong, and tear and puncture resistant. It is not Mylar.

  • Type Standard cover for refractors on alt-az or German equatorial mounts
    Closure Built-in drawstring
    Fit: TGR2 Coronado PST and short-tube 60-70 mm refractors: Alt-az and small GEM, tube length up to 16" (41 cm)
    Fit: TGR3 3" short-tube 80-120 refractors: Alt-az and small GEM, tube length up to 20" (51 cm)
    Fit: TGR4 4" refractors: Alt-az and mid-size GEM, tube length up to 30" (76 cm)
    Fit: TGR5 5" refractors: Mid-size or large GEM, tube length up to 45" (114 cm)
    Fit: TGR6 6" refractors (f1000 to f1200): Mid-size GEM, tube length up to 58" (147 cm); 48" (122 cm) vertical cover length
    Fit: TGR6-L 6" refractors (f1000 to f1200): Large GEM, tube length up to 58" (147 cm); 60" (152 cm) vertical cover length
    Series Standard TeleGizmos cover (temporary outdoor exposure)
    Material TeleGizmos solar radiant barrier material: multi-layer polyethylene with a fully aluminized surface and embedded fibrous webbing (not Mylar)
    Seams Double lap sewn
    Recommended use Temporary outside storage; for more than 1 to 2 weeks of continuous outdoor exposure, use a 365 Series cover
    Made in Texas, USA
    Warranty 1 year, materials and craftsmanship

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