Can You Leave a Telescope Outside | Factors To Consider

A telescope has quickly become one of the most sought-after pieces of equipment for not only amateur astronomers but also stargazing enthusiasts worldwide. It not only presents a means for discovery but also serves as a passport to the beauty of our universe. As we invest in these optical treasures, it’s essential to ask ourselves how to properly care for and store them. One of the fundamental questions we ought to consider is, can you leave a telescope outside? Read on for an in-depth exploration of this subject and FAQs related to telescope care.

Can you leave a telescope outside?

Yes, you can leave a telescope outside, but it depends on several factors.
Firstly, you need to consider the type of telescope you have. If you have a refractor telescope, which uses lenses to gather and focus light, it can be left outside as long as it is covered and protected from moisture. However, if you have a reflector telescope, which uses mirrors, it is not recommended to leave it outside for extended periods because the mirrors can degrade from exposure to the elements.

Secondly, you need to consider the weather conditions in your area. If you live in an area with high humidity, it is not recommended to leave your telescope outside because the moisture can damage the optics. Similarly, if you live in an area with frequent rain or snow, it is not recommended to leave your telescope outside without a protective cover.

Lastly, you need to consider the security of your telescope. Leaving your telescope outside makes it vulnerable to theft or damage from animals, so it is important to make sure that it is securely stored and protected.

In general, it is best to store your telescope indoors when not in use to ensure its longevity and prevent damage. If you do leave your telescope outside, make sure it is protected from the elements and secured from potential harm.

Can You Leave a Telescope Outside

Factors To Consider Before Leaving Your Telescope Outside

When contemplating whether to leave a telescope outside or not, several factors come into play. It’s essential to examine the climate and weather conditions of your area. Excessive humidity, temperature fluctuations, and the intrusion of dust, sand, or dirt can be detrimental to your device. If your area experiences continuous rain, snow, or strong winds, it’s wise to err on the safe side and store your telescope indoors. Additionally, take note of any potential safety risks, such as theft or damage brought on by curious critters.

Consequences Of Prolonged Outdoor Exposure

Regularly leaving your telescope outside can lead to severe consequences. You may notice degradation in overall performance, with issues such as declined accuracy, tarnished mirrors/lenses, or diminished image clarity. Moisture can also cause fungus or mildew growth inside the telescope’s tubes or on lenses, and electronic components could become compromised due to corrosion. Continuous exposure to UV rays can cause damage to the instrument’s mechanical parts and coatings on your optics, resulting in possible vision impairment when using your telescope.

How To Safely Store Your Telescope Outside

If you must leave your telescope outside for an extended period, invest in a weatherproof cover. These covers are designed to keep dust, moisture, and UV rays at bay. Make sure to choose one that is tailored to the shape of your telescope and has a snug fit. Alternatively, you can create your own cover using a tarp and bungee cords if you’re in a pinch. Additionally, a dehumidifier or desiccant can help regulate humidity levels.

Pros of Leaving a Telescope Outside

Cons of Leaving a Telescope Outside

  • Exposure to the elements, including rain, wind, and dust, can damage the telescope’s delicate parts
  • Prolonged sun exposure can cause the telescope’s paint to fade and the plastic components to become brittle
  • Risk of theft or vandalism

Maintenance Tips For Prolonging The Life Of Your Telescope

Whether you store your telescope indoors or outdoors, it’s essential to perform routine maintenance checks to ensure its longevity. Inspect the lenses or mirrors regularly for any signs of dust, dirt, or smudges, and clean them gently, following manufacturer recommendations. Periodically disassemble the telescope to check for issues, lubricate moving parts, and maintain alignment.

You can check reviews of telescopes here


The ideal storage solution for a telescope may vary depending on the specific model and environmental factors present in your location. While leaving a telescope outside might seem convenient for short-term usage, it’s crucial to weigh the long-term consequences on your instrument’s performance and longevity. With proper care and adequate storage measures, your telescope will continue to serve as your window to the cosmos for years to come


Q: How do I protect my telescope from dust or debris while outdoors?

A: Use lens caps while the telescope is not in use and avoid setting it up near environments prone to fine particles or splashing water.

Q: What’s the ideal indoor location for telescope storage?

A: Ideally, you should store your telescope in a controlled environment, such as a room with consistent temperature and humidity levels. Avoid direct sunlight, and keep it away from heating or cooling vents.

Q: How long can I safely leave my telescope covered outdoors?

A: The duration varies depending on your location’s climate and weather conditions. Regularly monitor the local forecast and promptly bring your telescope indoors if harsh conditions are expected.

Leave a Reply

Your email address will not be published. Required fields are marked *