Sky-Watcher Planetary Eyepiece - 5mm - 58 Degree
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OnBuy.comSky Watcher 5Mm Planetary Uwa 58 Deg Eyepiece 6970456096428
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Product Information
Full details
The Sky-Watcher 5mm Planetary Eyepiece is designed for amateur astronomers who demand high-resolution views of lunar and planetary details. Utilizing a modified Plossl optical design with a 58-degree field of view, this eyepiece provides excellent contrast and minimal distortion for high-magnification observation; however, users should note that the fixed 5mm focal length requires favorable atmospheric 'seeing' conditions to achieve its sharpest potential.
All features
| Brand | Sky-Watcher |
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Extended Product Information
FAQs
Does this eyepiece fit all telescopes?
It is compatible with any telescope equipped with a standard 1.25-inch focuser.
Can I use this for deep-sky observation?
While it can be used for small, bright objects like planetary nebulae, this eyepiece is specifically optimized for high-contrast, high-magnification planetary and lunar viewing.
How do I calculate the magnification with my telescope?
Divide the focal length of your telescope by 5mm. For example, a 1000mm focal length telescope would yield 200x magnification.
Is this eyepiece threaded for filters?
Yes, the barrel is threaded to accept standard 1.25-inch astronomical filters.
How often should I clean the lenses?
Only clean them when dust or smudges significantly impact your view. Frequent rubbing can degrade the multi-coatings.
Troubleshooting
Image appears blurry or soft.
Check if the telescope is properly collimated and allow the telescope tube to reach ambient thermal equilibrium with the outside air.
Difficulty finding objects in the field of view.
High-magnification eyepieces have a narrow true field. Ensure your finderscope is perfectly aligned with the main telescope before switching to the 5mm eyepiece.
Image jitters or shakes.
Tighten the mount tripod legs and verify the mount is locked in place, as high-power views amplify any mechanical instability.
Pros and Cons
Pros
- Superior contrast for lunar and planetary study
- Wide 58-degree field makes tracking objects easier
- High-quality multi-coatings for maximum light throughput
- Rugged build quality suitable for frequent use
Cons
- High magnification can be sensitive to atmospheric turbulence
- Limited to specific high-power applications
- Requires stable tripod/mount for best results
Setup, Compatibility & Care
This eyepiece features a standard 1.25-inch barrel, making it compatible with the vast majority of modern telescopes. To install, simply slide the barrel into your telescope's focuser drawtube or diagonal and tighten the thumbscrews firmly. When cleaning the optics, use only high-quality lens cleaning solution and a microfiber cloth, applying the fluid to the cloth rather than the lens surface to prevent seepage into the eyepiece barrel. Always cap the eyepiece when not in use to protect the multi-coatings from dust and moisture.