• Your shopping cart is empty!

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

  • Price: $220.00

Available Options



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

This Titan Series cover is designed for telescopes mounted on equatorial (EQ/GEM) mounts with larger optical tubes.

Size L fits setups with a total length (including accessories) of up to 50 inches (≈ 127 cm) — perfect for 10″ f/5 Newtonians, 12″ f/4 Newtonians, RC 12″ (carbon tube), RC 14″ (steel tube), and ED/APO refractors up to 150 mm with longer optical tubes.

📏 To ensure proper fit, measure the full length of your telescope with all attached accessories (diagonal, camera, filter wheel, etc.). If your setup is 50″ (127 cm) or shorter, this size is ideal.

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. These materials complement each other to deliver full protection under a wide range of environmental conditions.

  • The outer fabric is a PVC-coated nylon that provides 100% waterproof performance (tested above 7000 mmH₂O, AATCC-127). It’s durable, UV-resistant, color-stable, and easy to clean — ensuring years of service even with regular outdoor exposure.
  • The inner fabric features a multi-layer structure with a cotton base for insulation and a silvered surface that acts as a heat barrier, helping to prevent dew and reduce the effects of sudden temperature changes. The waterproof face adds an additional layer of moisture defense.

Thoughtful Design & Reliable Sealing

All Titan covers feature sealed seams and waxed, water-repellent threads to prevent moisture penetration.

For ease of use, each cover includes:

  • 🖐 Two reinforced handles for quick placement and removal.
  • 🪝 Elastic drawcord with toggle for a snug base fit.
  • 🔒 Corded hem with locking fasteners to secure the cover against wind.

Condensation & Optional Add-Ons

In certain weather conditions, condensation may occur inside any outdoor cover. To help minimize humidity and protect sensitive optics, Titan covers can be ordered with optional accessories:

  1. Removable desiccant pocket with reusable silica gel — maintains lower humidity inside the cover. The silica gel includes a color indicator that shows when it’s time to remove and dry it.
  2. Ventilation fan — promotes airflow inside the cover and helps prevent moisture buildup. The fan can be powered from a 12 V source or via the included USB adapter, allowing operation from a portable power bank 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 full weather protection.
  • 💧 Sealed seams and waxed threads for complete waterproofing.
  • 🪝 Adjustable drawcord and locking hem for secure fit.
  • 🖐 Dual handles for easy handling and placement.
  • 🌡 Optional humidity-control accessories to reduce 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 L cover is designed for telescopes with a total setup length (tube + accessories) up to 50 inches (≈127 cm) — but the cover itself measures approximately 61 inches (≈155 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.