PENTAX EYEPIECE XF-8.5

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Product Overview

  • Generous 60° Apparent Field of View
  • Fits Any Scope Using 1.25" Eyepieces
  • Extra-Low Dispersion Lanthanum Glass
  • Proprietary SMC Multi-Layer Lens Coating
  • Long & Comfortable 18mm Eye Relief
  • 6-Element/4-Group Lens Design
  • Twist-Up Click-Stop Eyecup
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Featuring a wide 60° field of view and generous 18mm eye relief for comfortable glassing, the Pentax XF SMC 8.5mm Eyepiece is designed for use with their 100, 80, and 65mm spotting scopes or any telescope or spotting scope that accepts standard 1.25" eyepieces. Extra-low dispersion lanthanum glass in the 6-element/4-group lens design provides a balanced image with minimal aberrations, while the proprietary SMC anti-reflection multi-layer lens coatings prevent reflection for optimal light transmission. The eyepiece is constructed to be water-resistant, easily withstanding light rain or dew. For digiscoping, there is a 30.5mm mounting thread under the removable twist-up click-stop eyecup for attaching your rings and adapters.


Key Features of the Pentax Eyepiece XF-8.5

  • Generous 60° Apparent Field of View
  • Fits Any Scope Using 1.25" Eyepieces
  • Extra-Low Dispersion Lanthanum Glass
  • Proprietary SMC Multi-Layer Lens Coating
  • Long & Comfortable 18mm Eye Relief
  • 6-Element/4-Group Lens Design
  • Twist-Up Click-Stop Eyecup

When Used with Pentax Spotting Scopes

  • PF-100ED: 74x power, the 42-foot field of view at 1000 yards (14m field of view at 1000m)
  • PF-80EDA: 61x power, the 49.5-foot field of view at 1000 yards (16.5m field of view at 1000m)
  • PF-80ED: 59x power, the 51-foot field of view at 1000 yards (17m field of view at 1000m)
  • PF-65EDAII: 46x power, the 66-foot field of view at 1000 yards (22m field of view at 1000m)
  • PF-65EDII: 46x power, the 66-foot field of view at 1000 yards (22m field of view at 1000m)

  • MPN - 70531
  • GTIN - 027075087330
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Model SMC XF 8.5mm
Magnification 46x (with the PF-65ED)
Field Stop Diameter 8.8mm
Thread Size 1.25"
Exit pupil (mm) at minimum magnification 1.4mm (with the PF-65ED)
Field of View at 1,000m 22m (with the PF-65ED)
Angular Field of View 1.3° (with the PF-65ED)
Eye relief 18mm
Lens Construction 6 Elements are Arranged into 4 Groups
Relative Brightness 1.90 (with the PF-65ED)
Twilight Factor 54.6 (with the PF-65ED)
Dimensions 43 x 83mm
Weight 150g
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What’s In The Box
  • Pentax Eyepiece XF-8.5
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