Pentax XW 3.5mm

Pentax XW 3.5mm


Incoming - Shipped 20-25 working days.

Model:  PentaxXW3.5
Part Number:  70511
Brand:  Pentax

The Pentax XW 3.5 is the shortest focal length eyepiece in the XW series with unsurpassed optical clarity and a 70 degree field of view.


  • High-refraction, low-dispersion Lanthanum glass.
  • Pentax Super Multi-Coatings (SMC) on all air/glass surfaces.
  • Edge-blackened optics and optimised baffles minimise internal reflections.
  • Optically corrected for use with focal ratios as fast as f/4.
  • 20mm eye-relief and twist-up rubber-rimmed eyecups - perfect for spectacle wearers.
  • Chromed barrels threaded to accept filters.
  • Weatherproof to JIS Class 4 standards.


Lens Structure: 8 elements, 5 groups
Focal Length: 3.5mm
Apparent Field of View: 70 degrees
Eye Relief: 20mm
Attachment Diameter: 1.25" (31.7mm)
Filter Diameter: 28.6mm
Field Stop Diameter: 4.3mm
Eyepiece Ring: Helicoid type
Height & Width: 5.4" x 2.4"
Weight: 14.3 oz. (405g)

Eyepiece Field of View Simulator

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