
Versatile eyepieces for telescopes and large binoculars
Perfectly equipped for visual observation
Eyepieces Telescopes
Top-Quality Eyepieces for Your Telescope
Your Guide to Finding the Ideal Model for Your Needs
A telescope is only half the story – the right eyepiece makes all the difference when it comes to truly memorable views of the Moon, planets, and deep-sky wonders. It’s the part that magnifies the image, sharpens the detail, and frames what you see.
Most beginner telescopes come with basic eyepieces that do the job – but if you’re ready for brighter, clearer, and more breathtaking views, it’s time to upgrade. A well-chosen eyepiece can transform your observing sessions.
Not sure where to start? Here's what you need to know – plus three trusted brands that deliver real value.
Explore Our Eyepiece Range – Something for Every Stargazer
Whether you're just getting started or have years of observing under your belt, we’ve got the right fit for your telescope. Our selection includes top brands known for quality optics and great performance – without breaking the bank. Let’s take a closer look:
BRESSER
BRESSER vis a long-standing favourite among astronomy enthusiasts – and for good reason. Known for their excellent value, their Plössl eyepieces offer quality optics at a very fair price. With focal lengths ranging from 5 to 40 mm, these eyepieces are ideal for enhancing small to mid-size telescopes. A brilliant choice if you’re looking to expand your setup without spending a fortune.EXPLORE SCIENTIFIC
Looking for a wider window to the universe? EXPLORE SCIENTIFIC is well-known for their eyepiece series with extra-wide fields of view that really show off the night sky. The range includes 52° eyepieces, 68° wide-angles, 82° ultra-wide models, and even 120° eyepieces for an immersive viewing experience. Expect superb image quality, comfortable eye relief, exceptional edge sharpness, and outstanding build quality.Plus, all models sharing the same apparent field of view are parfocal—meaning you’ll hardly need to refocus when switching between them. That’s a big plus when you’re chasing details on Jupiter or panning across the Milky Way.
Vixen
A big name in Japanese optics, Vixen has earned a stellar reputation among amateur astronomers. In our range, you’ll find popular Vixen series such as NPL and SLV. NPL eyepieces are a brilliant match for demanding beginners who want more from their telescope – offering sharp images with low chromatic aberration. SLV eyepieces step things up with high-contrast views and outstanding clarity across the whole field. Thanks to lanthanum glass, chromatic aberration is virtually eliminated. With a comfortable 20 mm eye relief, they’re also great for observations with or without glasses.Choosing the Right Eyepiece – What to Look For
If you’re just getting started with astronomy, chances are you’ll soon be asking:
Which eyepiece should I get next?
After a few observing sessions with the standard kit, many hobby astronomers want to improve image quality or try different magnifications. But with so many options out there, how do you choose the right one? Here’s a practical guide to the key features that will help you find the perfect eyepiece for your telescope setup.
Barrel Size
The barrel size refers to the standard diameter of the eyepiece shaft that fits into your telescope’s focuser. Two sizes are commonly used:- 1.25 inches (approx. 31.7 mm) – the most widely used size, especially on beginner and mid-range telescopes
- 2 inches (50.8 mm) – allows for a wider field of view, especially with long focal lengths, but requires a compatible 2” focuser
Using an adapter, many telescopes can accommodate both barrel sizes, offering greater flexibility.
Focal Length
The focal length of the eyepiece (in millimetres) determines the magnification when used with your telescope. The basic formula is:Magnification = Telescope focal length ÷ Eyepiece focal length
Example: With a 1,000 mm telescope and a 10 mm eyepiece, the result is 100× magnification (1,000 ÷ 10 = 100).
However, higher magnification is not always better. Excessive magnification can lead to dim and blurry images.
A good rule of thumb is: maximum useful magnification ≈ 2× per millimetre of aperture – meaning a 100 mm telescope is best used up to around 200× magnification.
How far you can push magnification doesn’t just depend on your equipment. Atmospheric turbulence – also known as seeing conditions – is always an important factor in astronomy.
Field of View
Besides magnification, your eyepiece also determines the true field of view you’ll see in the sky – through its apparent field of view (AFOV).But what do these terms actually mean?
- Apparent Field of View (AFOV): The width of the view as seen through the eyepiece by itself, without a telescope. Given in degrees, and fixed by the eyepiece design.
- True Field of View (TFOV): The actual slice of sky visible through your telescope and eyepiece combo. Also given in degrees, and calculated as follows:
TFOV ≈ AFOV ÷ Magnification
The table below illustrates how eyepiece focal length, magnification, and field of view relate to one another (assuming a telescope with 1,000 mm focal length). It compares eyepieces with 50° and 68° AFOV:
Eyepiece Focal Length | Magnification (with 1,000 mm telescope) | TFOV with 50° AFOV | TFOV with 68° AFOV |
---|---|---|---|
25 mm | 40× | ~1.25° | ~1.7° |
10 mm | 100× | ~0.5° | ~0.68° |
5 mm | 200× | ~0.25° | ~0.34° |
For comparison: The full Moon spans about 0.5° in the sky.
As you can see, a wider apparent field of view like 68° instead of 50° gives you a significantly broader slice of sky at the same magnification – making it easier to locate and track celestial objects.

What Are You Observing?
Different targets call for different magnifications. For the best flexibility during stargazing, it’s a good idea to own several eyepieces with different focal lengths:- Long Focal Length (≈ 20–40 mm) – low magnification
• Great for wide-field views and locating objects
• Bright image, wide true field of view
• Ideal for viewing extended objects like nebulae or star clusters in a single frame
- Medium Focal Length (≈ 10–20 mm) – medium magnification
• Versatile all-rounders
• Shows nice detail on planets and the Moon, while still covering a decent portion of sky
• Perfect for many deep-sky objects
- Short Focal Length (≈ 3–9 mm) – high magnification
• For zooming in on planets, lunar craters, or tight double stars
• Darker image, narrower field of view
• Reveals finer surface details
In practice, three eyepieces – one short, one medium, one long – are usually enough to cover most observing scenarios. You can always expand your setup later if you want to specialise in a particular target type.
Eye Relief and Comfort
Eye relief – also known as exit pupil distance – is the distance between the last lens and the point where your eye should be positioned to see the full image.A generous eye relief of 15–20 mm provides comfortable viewing. If the eye relief is too short, your eyelashes may smudge the lens, and glasses wearers won’t see the entire field of view.
Many eyepieces include adjustable eyecups to help you find the perfect eye position. For example, foldable rubber eyecups can be flipped back for glasses wearers, or kept extended to block stray light during observation. Other models, such as the SLV series from Vixen, are equipped with twist-up eyecups for even more comfort and flexibility.
Lens Coatings
Lens coatings play a crucial role in image quality. High-end eyepieces are usually fully multi-coated – meaning all glass surfaces are treated with multiple thin anti-reflective layers. This increases light transmission, boosts contrast and sharpness, and helps eliminate ghosting and unwanted reflections.In the BRESSER online shop, fully multi-coated optics are standard. The premium eyepieces from EXPLORE SCIENTIFIC even feature a patented EMD coating. Combined with internal baffling, this ensures maximum contrast.
Build Quality
Material and craftsmanship are also key when selecting an eyepiece. Precision-ground lenses made from high-quality glass – such as lanthanum – deliver superior colour correction and sharper images. Blackened lens edges reduce internal reflections, while a solid housing and metal barrel ensure long-lasting durability and a secure fit.Waterproofing
Since eyepieces are used outdoors, they must withstand the elements. Waterproof models offer reliable protection and a consistently clear view. Key benefits include:- Moisture protection: Prevents water ingress during damp conditions
- Dust and dirt protection: Keeps out dust, pollen, and other particles for longer lifespan
- Fog prevention: Gas purging (e.g. with argon) stops internal lens fogging and ensures clear views
BRESSER – Trusted Quality and Service
At BRESSER, we put our customers first. That’s why we offer a wide range of carefully selected eyepieces – from entry-level to advanced – backed by decades of experience in astronomy and precision optics.
Our expert team, made up of passionate amateur astronomers, is always happy to help. Whether you need buying advice or technical support, we're here for you.
Take a look through our range and find the perfect eyepiece to enhance your telescope setup. Enjoy your night-sky adventures – and clear skies!