Telescope eyepiece Celestron Luminos 15 mm, 15mm focal length, 1.7 cm barrel, multicolor

The Celestron Luminos 15 mm eyepiece is a mid-range magnification optical accessory designed to enhance visual astronomy and allow seamless eyepiece swaps. Featuring a 15 mm focal length and a 1.7 cm barrel diameter, this telescope eyepiece integrates an advanced optical set with full multi-coating to deliver crisp and sharp views of the night sky. Built with a wide 82-degree apparent field of view, it is engineered to help observers make the most of compatible telescopes, including short, fast refractors and advanced optical systems. The robust body is constructed from polished and anodized aluminum, complemented by a secure rubber grip and a convenient retractable eyecup.

Advantages

This optical accessory provides a generous 82-degree field of view that delivers immersive, expansive views of celestial objects. The fully multi-coated optical elements ensure optimal light transmission, resulting in high-contrast and sharp images. Because the Luminos series is parfocal, users can easily switch between different eyepieces during an observation session without needing to significantly readjust the focus. The durable polished and anodized aluminum body features a tactile rubber grip that also functions as a twist-to-adjust mechanism for the retractable eyecup, ensuring comfortable viewing for both eyeglass wearers and non-wearers. Additionally, the standard insert barrel includes internal threading to securely accept compatible optical filters.

Suitable for

• Planetary observation to view surface details on planets
• Detailed lunar observation of craters and maria
• Visual astronomy sessions requiring mid-range magnification
• Quick and convenient eyepiece swaps during stargazing

When it may not be suitable

This eyepiece may not be ideal for users seeking ultra-high magnification for extremely distant deep-sky objects or those whose telescopes require barrel sizes other than the 1.7 cm standard.

Key specifications

• 15 mm focal length
• 1.7 cm barrel diameter
• 82-degree apparent field of view
• Fully multi-coated optical elements
• Polished and anodized aluminum body
• Retractable twist-up eyecup with rubber grip
• Filter-threaded insert barrel
• Dimensions: 131 x 102 x 100 mm

How to use

To use the Celestron Luminos 15 mm eyepiece, first remove the protective dust caps from both ends of the accessory. Insert the 1.7 cm barrel directly into the telescope's focuser or star diagonal, and secure it firmly by tightening the thumbscrews on the telescope. If you wish to use optical filters, screw them onto the threaded end of the barrel prior to insertion. Adjust the rubber eyecup by twisting the grip to your preferred height for comfortable viewing with or without eyeglasses. Direct the telescope toward your target object and use the telescope focusing knob to achieve a sharp image.

What to consider before purchase

• Verify that your telescope is compatible with a 1.7 cm barrel diameter eyepiece.
• Assess whether a 15 mm focal length provides the desired mid-range magnification for your specific telescope optical setup.
• Confirm if you plan to use standard threaded filters that fit the barrel.

Store the eyepiece in a dry, dust-free environment with protective caps attached when not in use. Clean the optical surfaces only with specialized lens cleaning materials to preserve the multi-coating quality.