Arcturus Ebony 8mm 70 Degree SWA (Refurbished)

The Arcturus Ebony 8mm 70 Degree SWA eyepiece is an astronomical accessory used for observing celestial objects through telescopes. Here's an overview of its features and functionality:

1. Focal Length: The Arcturus Ebony 8mm eyepiece has a focal length of 8mm. This determines the magnification level when used with a telescope. A shorter focal length eyepiece like this one provides higher magnification and a narrower field of view compared to longer focal length eyepieces.

2. Apparent Field of View (AFOV): The 70-degree AFOV (apparent field of view) means that the eyepiece offers a wide field of view, providing expansive views of celestial objects and making it easier to locate and track targets in the night sky.

3. SWA Design: The SWA (Super Wide Angle) design of the Arcturus Ebony eyepiece ensures a comfortable viewing experience with minimal distortion and edge aberrations across the entire field of view. This design is favored by astronomers for its immersive views and enhanced observing experience.

4. Optical Elements: The eyepiece is constructed with high-quality optical elements to deliver sharp, clear, and contrast-rich views of celestial objects. Multi-coatings on the lens surfaces help reduce glare and improve light transmission, resulting in brighter and more detailed images.

5. Eyepiece Barrel Size: The barrel diameter of the Arcturus Ebony 8mm eyepiece is not specified in your query. However, typical barrel sizes for astronomical eyepieces are 1.25 inches or 2 inches, which are compatible with most telescopes. It's important to ensure compatibility with your telescope's focuser size before purchasing.

6. Comfortable Eye Relief: The eyepiece likely features a comfortable eye relief, allowing observers to view through the eyepiece without discomfort, even when wearing eyeglasses. This is beneficial for extended observing sessions, especially for eyeglass wearers.

7. Build Quality: The Arcturus Ebony eyepiece is constructed with precision engineering and durable materials, ensuring longevity and reliability even with frequent use in various observing conditions.

8. Versatility: The 8mm focal length makes this eyepiece suitable for observing a wide range of celestial objects, including planets, lunar details, star clusters, and nebulae. It can be used with different telescope types, such as refractors, reflectors, and catadioptric telescopes.