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Pentax SMC-XW 23 mm eyepiece, black barrel with rubber grip, chrome accents

PENTAX

PENTAX SMC-XW 23 mm 85° eyepiece

SKU CH-92DK-0755J

A 23 mm eyepiece with an 85° apparent field of view and 20 mm eye relief for immersive, comfortable astronomy

  • Immersive panoramic views with an 85° apparent field of view
  • Sharp, high-transmission images from Pentax multi-layer coated optics
  • Comfortable extended sessions thanks to 20 mm eye relief, 12 mm from rubber eyeguard
  • Reliable performance in damp conditions with JIS Class 4 equivalent splash-proof construction
  • Versatile 23 mm focal length suits nebulae, star clusters and wide-field astrophotography

Pentax SMC-XW 23 mm 85° eyepiece

The Pentax SMC-XW 23 mm eyepiece provides an 85° apparent field of view for immersive astronomical observing. Multi-layer coatings maximise light transmission and suppress glare across the wide view. Generous 20 mm eye relief (12 mm from the rubber guard) allows comfortable, full-frame viewing with eyeglasses. JIS Class 4 equivalent splash-proof construction resists light moisture during outdoor sessions.

Suited for visual observers wanting maximum field

This eyepiece suits visual observers who prioritise the widest possible apparent field and long eye relief for extended sessions. It also fits astrophotographers seeking a high-quality wide-angle ocular for compatible spotting scopes. Buyers who need a narrower field for planetary detail or a shorter focal length for higher magnification should consider other models. Users requiring waterproof immersion rating rather than splash resistance should look elsewhere.

85° apparent field of view

The single specification that decides fit is the 85° apparent field of view combined with 23 mm focal length. This ultra-wide angle delivers expansive vistas of nebulae and star clusters that narrower designs cannot match. If your observing style demands the broadest possible window on the sky, this eyepiece meets that requirement; if you prefer higher power or a more conventional field, a different focal length or series would be appropriate.

Highlights

  • Immersive panoramic views with an 85° apparent field of view
  • Sharp, high-transmission images from Pentax multi-layer coated optics
  • Comfortable extended sessions thanks to 20 mm eye relief, 12 mm from rubber eyeguard
  • Reliable performance in damp conditions with JIS Class 4 equivalent splash-proof construction
  • Versatile 23 mm focal length suits nebulae, star clusters and wide-field astrophotography

Specifications

No published specifications for this item yet.

Questions about this item

Will the 23 mm focal length and 85° apparent field work with my existing telescope focuser?

The eyepiece provides an 85° apparent field of view at 23 mm focal length; compatibility depends on your telescope's barrel size and focuser travel, which are not described here.

How can I verify the 85° apparent field and 20 mm eye relief are performing correctly after setup?

Point the telescope at a bright star field; the view should span an ultra-wide 85° apparent field, and you should see the full circle with glasses on at roughly 20 mm eye relief.

Does the box include only the 23 mm eyepiece or are caps, case or adapters also supplied?

The supplied facts list only the eyepiece itself with its 85° field, 23 mm focal length, 20 mm eye relief and splash-proof construction; no accessories are mentioned.

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