Sky-Watcher Planetary UWA Eyepiece - 2.5mm
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Wex Photo VideoSky-Watcher Planetary Eyepiece 2.5mm UWA - 58 Degree FOV
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OnBuy.comSky Watcher 2.5Mm Planetary Uwa 58 Deg Eyepiece 6970456091676
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Product Information
Full details
The Sky-Watcher Planetary UWA 2.5mm eyepiece is specifically engineered for amateur astronomers seeking high-magnification views of the Moon and planets. By leveraging a modified Plossl optical design with five fully multi-coated elements, it delivers impressive contrast and minimal distortion for detailed celestial observation. While it provides an immersive 58-degree field of view, its high magnification factor requires a very stable telescope mount and steady atmospheric conditions to achieve a truly crisp image.
All features
| Brand | Sky-Watcher |
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Extended Product Information
FAQs
Will this eyepiece fit my telescope?
This eyepiece fits any telescope that accepts standard 1.25-inch barrel size accessories.
What is the best type of target for a 2.5mm eyepiece?
This eyepiece is best suited for high-contrast, bright targets like the Moon, Saturn, Jupiter, and Mars.
Does this eyepiece require a barlow lens?
Typically no; a 2.5mm eyepiece already provides high magnification. Adding a Barlow lens will likely exceed the useful magnification limit of your telescope.
How do I calculate the magnification provided by this eyepiece?
Divide the focal length of your telescope (in mm) by 2.5. For example, a 1000mm telescope will yield 400x magnification.
Is this eyepiece suitable for deep-sky objects?
It is generally not recommended for deep-sky objects, which often require lower magnification and a wider field of view than a 2.5mm lens provides.
Troubleshooting
Image appears blurry or soft.
Check telescope collimation and ensure the atmosphere is stable; atmospheric turbulence often prevents high-power observation.
Difficulty finding objects in the field of view.
Use a low-power eyepiece to center your target first, then swap to the 2.5mm eyepiece once the object is aligned in the center.
Blackout or kidney-beaning while looking through the eyepiece.
Adjust your eye distance slightly and ensure your eye is centered perfectly with the exit pupil of the eyepiece.
Pros and Cons
Pros
- Excellent high-magnification performance for planetary details
- High-contrast, multi-coated glass elements
- Wide 58-degree field of view enhances observational immersion
- Effective distortion control across the frame
Cons
- Demands very steady atmospheric 'seeing' conditions
- Requires a high-quality, stable mount to manage high magnification
- Very small exit pupil requires precise eye placement
Setup, Compatibility & Care
This eyepiece features a standard 1.25-inch barrel diameter, making it compatible with most modern amateur telescopes. To install, simply loosen the thumbscrew on your telescope's focuser or star diagonal, insert the eyepiece, and gently tighten the screw to secure it.
For care and maintenance:
- Always replace the dust caps immediately after use to prevent debris buildup.
- Clean the lenses only with high-quality optical cleaning solution and microfiber cloths.
- Store the eyepiece in a cool, dry environment, preferably inside a padded case with silica gel packets to prevent fungus growth on the lens coatings.