If you’re new to astronomy, you might wonder what is a hand held telescope called. The most common answer is a monocular, but there are a few other names and types to know. These compact optical devices let you see distant objects clearly without the bulk of binoculars or a full-sized telescope. They are perfect for quick observations, travel, and activities where you need to keep your gear light.
This guide will explain everything about these portable viewers. We’ll cover the different names they go by, how they work, and what to look for when you buy one. You’ll also learn how to use them effectively for various hobbies, from birdwatching to stargazing.
What Is A Hand Held Telescope Called
The primary name for a hand held telescope is a monocular. It’s essentially half of a pair of binoculars, using a single barrel for one eye. The term “telescope” usually refers to larger instruments that need a tripod, so “monocular” is the correct technical term for the handheld version. However, in casual conversation, people might use other terms interchangeably.
Sometimes, you might hear them called a “spotting scope,” though true spotting scopes are often larger and might need a tripod. Compact or pocket telescopes are also common names, especially in marketing. The key feature is that you can hold it steady in your hand for short to medium periods of time.
Monocular vs. Binoculars: Key Differences
Understanding the difference helps you choose the right tool. A monocular has one lens system. It’s smaller, lighter, and easier to slip into a pocket. Because you use one eye, it can feel less immersive than binoculars, but it’s incredibly convenient.
Binoculars use two parallel optical tubes. They provide stereoscopic vision, which can enhance depth perception. However, they are heavier and bulkier. For long hikes or situations where pack space is critical, a monocular often wins.
- Size & Weight: Monoculars are almost always smaller and lighter.
- Field of View: Binoculars often have a wider field of view, making it easier to locate objects.
- Ease of Use: Some people find it easier to stabilize a monocular with one hand against their face.
- Cost: For similar optical quality, a monocular is typically less expensive than a pair of binoculars.
Common Specifications Explained
When you shop for a monocular, you’ll see numbers like “8×42” or “10×25.” The first number is the magnification. An 8x monocular makes an object appear eight times closer. The second number is the objective lens diameter in millimeters. A larger lens (like 42mm) gathers more light, giving you a brighter image, especially in low-light conditions.
Higher magnification isn’t always better. An 8x or 10x monocular is generally the most practical for handheld use. Anything above 10x can be very difficult to hold steady without support. The image will shake with your hand movements, making details hard to see.
Lens Coatings and Prism Types
Lens coatings are crucial for image quality. They reduce glare and internal reflections, increasing light transmission. Look for terms like “fully multi-coated” for the best performance. The prism inside the monocular corrects the image orientation. Most use either a roof prism (allowing a straight barrel design) or a Porro prism (often resulting in a wider body). Roof prism designs are typically more compact and durable.
Best Uses for a Handheld Monocular
A monocular is incredibly versatile. Its portability opens up many activities where larger optics would be a burden.
- Wildlife and Bird Watching: Quickly zoom in on birds or animals without disturbing them. Its one-handed operation is great when you’re also holding a field guide or steadying yourself.
- Hiking and Backpacking: Scan ahead on trails, identify distant landmarks, or get a closer look at a mountain peak. The light weight is a major advantage.
- Sports and Events: Get a better view at a stadium, racetrack, or outdoor concert. Many are small enough to fit in a jacket pocket.
- Stargazing (Basic): While not a replacement for an astronomical telescope, a monocular with good light gathering (like a 10×50) can offer lovely views of the moon, star clusters, and bright planets.
- Travel: See architectural details on buildings, read signs from a distance, or enjoy scenic overlooks without carrying heavy gear.
How to Choose the Right One for You
With so many options, selecting a monocular can feel overwhelming. Focus on how you plan to use it most often. Your primary activity will dictate the best specifications.
For General Purpose and Daytime Use
If you want a monocular for walks, sports, or casual wildlife viewing in good light, a compact model is ideal. Look for an 8×25 or 10×25 configuration. These are very small, lightweight, and affordable. The image will be bright enough for daytime, and the lower magnification makes them easier to hold steady.
For Low-Light and Nature Observation
For dawn, dusk, or forested areas, you need more light-gathering power. Choose a monocular with a larger objective lens. An 8×42 or 10×42 is a fantastic all-around choice for serious birders and hikers. The larger lens makes the device bigger, but the brighter image is worth it for many users.
For Long-Range Viewing and Details
If you need to see very far, like for surveillance or hunting scouting, you might consider a 12x or even 15x monocular. Be warned: these are extremely hard to hold steady by hand. You will almost certainly need to rest it on a solid surface or use a mini-tripod for clear viewing. Image stability becomes the main challenge.
Important Features to Consider
- Water and Fog Proofing: Look for O-ring seals and nitrogen purging. This prevents internal fogging and protects the optics from rain and dust, which is essential for outdoor use.
- Eye Relief: This is the distance your eye can be from the lens and still see the full image. If you wear glasses, seek an eye relief of 14mm or more.
- Close Focus Distance: Some monoculars can focus on objects just a few feet away. This is great for looking at insects, flowers, or even reading a detailed map.
- Smartphone Adapter Compatibility: Many monoculars now offer optional adapters that let you attach your smartphone. This allows you to take photos or video through the lens, which is a really fun feature.
Step-by-Step Guide to Using Your Monocular
Using a monocular effectively takes a little practice. Follow these steps to get the best results.
- Adjust the Eyecup: If you wear glasses, twist down the rubber eyecup. If you don’t wear glasses, leave it up to block stray light.
- Set the Diopter: Most monoculars have a diopter adjustment ring, usually on the eyepiece. Cover the objective lens, look at a plain surface, and adjust this ring until the view is sharp for your eye. This compensates for differences in your vision.
- Find Your Target First: Always locate the object you want to see with your naked eye first. Trying to find it through the monocular while its magnified is frustrating.
- Hold it Steady: Bring the monocular to your eye. Tuck your elbows into your chest for support. If possible, lean against a tree, wall, or car. The steadier you are, the clearer the view.
- Focus: Use the central focus wheel to sharpen the image. Move it slowly until everything is crisp.
Tips for Better Stability
Hand shake is the enemy of clear viewing. Here are some techniques to improve stability:
- Use both hands: Cradle the hand holding the monocular with your other hand.
- Practice your breathing: Gently exhale and pause for a moment to take your view. This is a technique often used by photographers.
- Sit down: If you can, sit and rest your elbows on your knees.
- Use a support: Press the monocular against a window frame, fence post, or rock.
Maintenance and Care for Longevity
Taking good care of your monocular will ensure it lasts for years. The lenses are delicate and need proper handling.
First, always use a lens cap when the device is not in use. This protects the glass from scratches and dust. If you need to clean the lenses, use a soft brush or air blower to remove loose particles first. Rubbing grit across the lens will scratch the coatings.
For smudges, use a lens cleaning cloth made for optics or camera lenses. You can use a drop of lens cleaning fluid on the cloth, but never spray it directly onto the lens. Store your monocular in a dry place, ideally in its protective case. Avoid leaving it in extreme heat, like a car dashboard on a sunny day, as this can damage the seals and optical glue.
Common Problems and Solutions
Sometimes, you might encounter issues. Here’s how to troubleshoot them:
- Blurry Image: Check that the diopter is set correctly and that you’ve used the focus wheel. Also, ensure the lens caps are completely removed.
- Double Image: This can happen if the prisms get knocked out of alignment. This requires professional repair.
- Dust Inside the Lens: If dust appears between the internal lenses, and the unit is not sealed, it may need to be serviced. Sealed models should not have this problem.
FAQ Section
Q: What is the difference between a monocular and a telescope?
A: A telescope is designed for high-magnification astronomical viewing and almost always requires a tripod. A monocular is for lower-power, general-purpose viewing and is designed to be held in your hand.
Q: Can you use a monocular for stargazing?
A: Yes, but with limits. A monocular is great for viewing the moon, star clusters like the Pleiades, and maybe the rings of Saturn if it’s powerful enough. For deep-sky objects like galaxies, a larger astronomical telescope is better suited.
Q: Are hand held telescopes good for bird watching?
A: Absolutely. Many birders love monoculars for their quick deployment and one-handed use, especially when they need their other hand for balance or a field guide. A model with good close-focus is ideal for watching nearby birds.
Q: What does 10×50 mean on a monocular?
A: The “10x” means 10 times magnification. The “50” refers to the diameter of the front (objective) lens in millimeters. A 50mm lens gathers a lot of light, making this a good choice for low-light conditions, but it will be larger and heavier.
Q: How do I attach my phone to a monocular?
A> You need a universal smartphone adapter. These are clamps that hold your phone securely. You align your phone’s camera lens over the monocular’s eyepiece, tighten the clamp, and use your phone’s camera app to see and capture the magnified image.
Making Your Final Decision
Choosing your first monocular is exciting. Remember to prioritize portability if you’ll carry it often, or light gathering if you’ll use it in dim conditions. Read reviews from other users with similar interests. And finally, consider your budget—there are excellent quality options available at various price points. A well-chosen monocular can become a trusted companion for all your adventures, offering a new perspective on the world around you.