Pentax SMC Pentax XW-7 Eyepiece – Premium Wide-Angle Performance

Outstanding Optical Quality for Astronomy & Observation

The Pentax SMC XW-7 Eyepiece is designed for discerning astronomers and observers who demand exceptional clarity, wide-angle viewing, and superior comfort. With its 7mm focal length and 70° apparent field of view, this eyepiece is perfect for high-magnification planetary, lunar, and deep-sky observation – delivering bright, sharp, and distortion-free images right to the edge of the field.

Crafted with high-refraction, low-dispersion Lanthanum glass, the XW-7 virtually eliminates chromatic aberration, while Pentax’s renowned Super Multi-Coating (SMC) maximises light transmission across all air-to-glass surfaces. This results in crisp, high-contrast images with natural colour balance.

Key Features

• High-Performance Optics – Premium Lanthanum glass for reduced chromatic aberration.

• Pentax Super Multi-Coating (SMC) – Enhances light transmission and suppresses ghosting or flare.

• Edge-Blackened Optics & Baffling – Minimises internal reflections for maximum contrast.

• Fast Telescope Compatibility – Fully corrected for use with systems as fast as f/4.

• Generous 20mm Eye Relief – Comfortable viewing, even for spectacle wearers.

• Twist-Up Rubber Eyecups – Adjustable helicoid eyepiece ring for personalised eye positioning.

• Filter Compatibility – Chromed barrels are threaded to accept 1.25" filters.

• Weatherproof Construction – Built to JIS Class 4 standards, providing reliable protection against the elements.

Technical Specifications

• Lens Construction: 8 elements in 6 groups

• Focal Length: 7mm

• Apparent Field of View: 70°

• Eye Relief: 20mm

• Attachment Diameter: 1.25" (31.7mm)

• Filter Thread Diameter: 28.6mm

• Field Stop Diameter: 8.8mm

• Eyepiece Ring Type: Helicoid (twist-up)

• Dimensions (H x W): 4.7" x 2.4"

• Weight: 390g (13.8 oz)

Built for Serious Observers

With its combination of precision optics, wide-angle performance, and rugged build quality, the Pentax SMC XW-7 is a premium eyepiece for amateur astronomers and professionals alike. Whether you’re exploring lunar craters, studying planetary details, or resolving deep-sky objects, this eyepiece delivers breathtaking clarity and comfort for extended viewing sessions.