• Your shopping cart is empty!

Telescope Cover (Size XL) on Equatorial (EQ/GEM) – Titan

  • Price: $230.00

Available Options



Telescope Cover (Size XL) on Equatorial (EQ/GEM) – Titan

This Titan Series cover delivers maximum protection for large, observatory-class telescopes mounted on equatorial (EQ/GEM) mounts.

Size XL is our largest format, designed for extra-long optical tubes with attached accessories. It fits setups with a total length of up to 60 inches (≈ 152 cm) — ideal for 16″ Ritchey-Chrétien, 12″ f/5 Newtonians, long-focus refractors 150–160 mm, and other large telescopes of similar size.

📏 Always measure the full length of your telescope, including all attached components (diagonal, filter wheel, camera, etc.), before ordering.

Built for Long-Term Outdoor Protection

Titan Covers are engineered for long-term outdoor storage of telescopes and mounts, providing reliable protection against rain, snow, UV exposure, dust, and sudden temperature fluctuations.

Each Titan cover is made from two high-quality fabrics — an outer waterproof fabric and an inner thermal barrier fabric. Together they form a complete protection system for year-round use, whether in a home observatory or under open skies.

  • The outer fabric is a PVC-coated nylon that ensures 100% waterproof performance (tested above 7000 mmH₂O, AATCC-127). It’s UV-resistant, durable, color-stable, and easy to clean.
  • The inner fabric has a multi-layer structure with a cotton base for insulation and a silvered surface that serves as a heat barrier, helping to prevent dew and smooth out temperature changes. Its waterproof face adds an additional layer of moisture defense.

Thoughtful Design & Reliable Sealing

All Titan covers feature sealed seams and waxed, water-repellent threads, ensuring complete protection from moisture penetration.

For user convenience, each cover includes:

  • 🖐 Two reinforced handles for easy placement and removal.
  • 🪝 Elastic drawcord with toggle for a snug, secure fit around the base.
  • 🔒 Corded hem with locking fasteners to prevent lifting in windy conditions.

Condensation & Optional Add-Ons

In certain environments, condensation may form inside any outdoor cover. To help reduce humidity and protect sensitive optics, Titan covers can be ordered with optional accessories:

  1. Removable desiccant pocket with reusable silica gel — maintains low humidity inside the cover. The silica gel includes a color indicator that shows when it’s time to dry and reuse.
  2. Ventilation fan — improves air circulation inside the cover and helps prevent moisture buildup. The fan can be powered by a 12 V source or via the included USB adapter, allowing operation from portable power banks in the field.

⚠️ The fan option must be selected at the time of purchase; installation requires factory sealing and cannot be added later.


Additional humidity-control options will be available soon.

Key Features

  • ✅ Two complementary fabrics for complete weather protection.
  • 💧 Sealed seams and waxed threads for full waterproofing.
  • 🪝 Adjustable drawcord and locking hem for a secure fit.
  • 🖐 Dual handles for easy handling and removal.
  • 🌡 Optional humidity-control accessories to minimize condensation.

Titan Series Materials

Outer Fabric — PVC-Coated Nylon

  • 💧 100% waterproof (> 7000 mmH₂O AATCC-127).
  • 🛡 High abrasion resistance (160,000 cycles).
  • 🌞 UV-stable and fade-resistant finish.
  • 🧽 Easy to clean with a soft brush or mild solution.
  • ✅ PFAS-Free — environmentally safe material.

Inner Fabric — Multi-Layer Thermal Barrier

  • ✨ Silvered surface acts as a heat barrier and enhances insulation.
  • 🔒 Cotton base improves thermal stability.
  • 💧 Waterproof face adds extra moisture defense.
  • 🌿 Eco-friendly dye with long-lasting color.
  • 🧼 Durable and easy to maintain.

🧵 Cover Dimensions & Fit Guide

To help you choose the right size, this section includes:

  • 📏 An illustration showing the dimensions of this cover
  • 🧭 A demo image explaining how to properly measure your telescope setup

📏  Dimensions of this cover

Understanding the Cover Dimensions

The illustration shows the actual dimensions of this telescope cover.

These dimensions are slightly larger than the maximum recommended telescope length for this size, to allow for an easy and proper fit.

For example, the Size XL cover is designed for telescopes with a total setup length (tube + accessories) up to 60 inches (≈152 cm) — but the cover itself measures approximately 74 inches (≈188 cm) in length.

This built-in allowance ensures:

  • ✅ Easy placement and removal of the cover
  • ✅ A proper fit without straining the fabric or seams
  • ✅ Better airflow and protection around attached accessories

All sizes are designed with this margin to accommodate real-world telescope configurations.

✅ How to Measure Your Telescope

To determine if this cover will fit your telescope, measure the total length of your optical tube including any equipment attached to the focuser — such as a diagonal, camera, filter wheel, or other accessories.

📌 For Newtonian telescopes, you typically only need to measure the tube length, as most accessories point downward in the parked position and don’t add to the total length of the setup.

Please keep in mind that the overall size of your telescope depends not just on the optical tube, but also the mount type, configuration, and accessories.

⚠️ Many Scopes, Many Combinations

There are countless combinations of telescope + mount + accessories, and it’s simply not possible to offer a pre-made cover for every setup.

That’s why we offer a custom telescope cover service — tailored specifically for your equipment.

We create covers for any telescope type or size, whether it’s a compact refractor or a large observatory-class setup.

🧵 Need a Custom Fit?

Use our contact form to reach out — or try our Cover Configurator (coming soon) to order a made-to-measure solution.

Let us protect your scope — exactly the way it deserves.