Pentax SMC XW 7mm 1.25" eyepiece (12341)

Pentax XW-Series eyepieces are designed for high-grade spotting scopes and offer exceptional performance for both casual and specialized observation. These wide-angle eyepieces provide a 70° apparent field of view and a long 20mm eye relief, ensuring comfortable and immersive viewing, even for those who wear glasses. The optics use high-refraction, extra-low-dispersion lanthanum glass elements to deliver sharp, well-balanced images with minimal aberrations. The design also helps reduce the blackout effect by compensating for the spherical aberration of the pupil.

All air-contact lens surfaces are treated with Pentax’s original multi-layer coating, while laminated surfaces feature an innovative partial coating. This results in outstanding light transmission efficiency of over 90% across the visible spectrum, reaching up to 96% at 550nm. Advanced light-shielding technology is used to minimize internal reflections, providing brighter and higher-contrast images. The eyepieces are built with weatherproof construction to JIS Class 4 standards, making them suitable for use in damp or dewy conditions, but they are not intended for underwater use. The XW-Series offers several magnification options, with some models specifically designed for astronomical observation.

These eyepieces combine advanced optical technology, wide-angle comfort, and weatherproof durability, making them an excellent choice for both terrestrial and astronomical viewing.

Key Features:

• 70° apparent field of view for a wide, immersive image

• 20mm eye relief for comfortable viewing, even with glasses

• High-refraction, extra-low-dispersion lanthanum glass elements for excellent image quality

• Fully multi-coated optics for superior light transmission

• Advanced light-shielding diaphragm for improved image contrast

• Weatherproof construction (JIS Class 4) for reliable outdoor use

• Rotatable, adjustable eyepiece cup for added comfort

• Compatible with optional camera adapters and filters

Specifications:

• Focal length: 7 mm

• Apparent field of view: 70°

• Eye relief: 20 mm

• Number of lenses: 8

• Number of groups: 6

• Telescope connection: 1.25"

• Camera end connector: M43

• Optical coating: Fully multi-coated (FMC)

• Light transmission: 96% at 550 nm

• Field stop: 8.8 mm

• Adjustable eyepiece cup: Yes (rotatable)

• Optional camera adapter: Yes

• Filter thread: Yes

• Inert gas charge: No

• Series: XW

• Weight: 390 g

• Length: 120 mm

• Diameter: 61 mm

• Type: Eyepiece

• Build: Super Wide Angle (SWA)