Pentax Eyepiece SMC XW 23mm 2"

Exceptionally Wide Field of View

Unveiling the latest advancements in the XW series, these two new eyepieces boast an expansive field of view, standing at an impressive 85°, the largest within the series. Coupled with an ample eye relief of 20 mm, they offer a particularly generous viewing perspective, perfect for enthralling observations of nebulae and star clusters.

Premium Optics for Superior Image Clarity

Designed to surpass the standards set by the conventional XW series, these new eyepieces feature an optical system comprising 7 elements arranged in 5 groups. This advanced setup ensures sharp star images right to the edge of the field of view. Incorporating high-performance lanthanum glass elements with exceptional refractive power and minimal dispersion, they deliver a well-balanced image with minimal aberrations. Specifically engineered to mitigate the frustrating blackout effect, they effectively compensate for pupil spherical aberration.

PENTAX's Signature Multi-Coating for Optimal Light Transmission

To achieve remarkable light transmission, all lens surfaces exposed to air are treated with PENTAX's original multi-coating, while laminated surfaces receive the innovative partial coating. This combination results in light transmission exceeding 90% (a remarkable 96% at 550nm) across the visible light spectrum.

Advanced Light-Shielding Technology for Enhanced Image Contrast

Leveraging PENTAX's advanced computer simulation technology, the XW series incorporates a light-shielding diaphragm strategically positioned to significantly reduce internal reflections. This innovation results in a notably brighter, higher-contrast image, elevating your viewing experience.

Weatherproof Construction for Durability

Constructed with JIS Class 4* weatherproofing, the XW Series ensures reliability even in drizzly or dewy nighttime conditions.

Specifications:

Focal Length: 23 mm

Apparent Field of View: 85°

Eye Relief: 20 mm

Number of Lenses: 7

Number of Groups: 5

Optical System Coating: SMC multi-coating

Light Transmission: 96%

Field Stop: 12 mm

Special Features: Adjustable Eyepiece Cup (Rotatable), Optional Camera Adapter

Filter Thread: Yes

Inert Gas Charge: No

Type: Eyepiece

Build Type: UWA

Series: XW

Weight: 770 g

Length: 125 mm

Diameter: 76 mm