Pentax

Pentax 70940 PF-100ED Spotting Scope with Case

4.3 (58 reviews)

Experience Nature in Vivid DetailThe Pentax PF-100ED spotting scope offers exceptional image quality and brightness. It has a large objective lens, ED optics, and a rugged, weather-resistant design. Brand: Pentax Model: 70940 Objective Lens Diameter: 100mm Optics: Extra Low Dispersi...

$1,646.00*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

Experience Nature in Vivid Detail

The Pentax PF-100ED spotting scope offers exceptional image quality and brightness. It has a large objective lens, ED optics, and a rugged, weather-resistant design.

  • Brand: Pentax
  • Model: 70940
  • Objective Lens Diameter: 100mm
  • Optics: Extra Low Dispersion (ED)
  • Eyepiece Compatibility: Standard 1 1/4-inch telescope eyepieces
  • Waterproof: Yes
  • Fogproof: Yes
  • Nitrogen Filled: Yes
  • Includes: Field Case

Key Features

Large 100mm objective lens for bright viewing in all lighting conditions

Utilizes the XL telescope eyepieces renowned for their sharpness, field of view, contrast, and freedom from aberration

Extra Low Dispersion (ED) optics incorporate Lanthanum Crown (rare earth) glass elements for optimum resolution

Accepts all standard 1 1/4-inch interchangeable telescope eyepieces

Waterproof, fogproof, and nitrogen filled

Specifications

Brand
Pentax
Model
70940 PF-100ED
Objective Lens Diameter
100mm
Optical Features
Extra Low Dispersion (ED) optics, Lanthanum Crown (rare earth) glass elements
Eyepiece Compatibility
Accepts all standard 1 1/4-inch interchangeable telescope eyepieces
Included Eyepieces
XL telescope eyepieces (renowned for quality)
Environmental Protection
Waterproof, Fogproof, Nitrogen filled
Accessories
Case

Pros & Cons

👍 Pros

  • Features a large 100mm objective lens, ensuring bright viewing and excellent light gathering even in low-light conditions.
  • Utilizes Extra Low Dispersion (ED) optics with Lanthanum Crown glass elements for optimum resolution and reduced aberrations.
  • Designed to accept all standard 1 1/4-inch interchangeable telescope eyepieces, offering broad compatibility and customization.
  • Comes equipped with XL telescope eyepieces, renowned for their sharpness, field of view, contrast, and freedom from aberration.
  • Provides robust protection against elements, being waterproof, fogproof, and nitrogen filled for reliable outdoor use.

👎 Cons

  • While it comes with a case, the large 100mm objective lens and XL eyepieces may result in a heavier and less compact unit.
  • Reliance on 1 1/4-inch telescope eyepieces means specific spotting scope eyepieces might not be directly compatible.
  • The mention of "XL telescope eyepieces" implies they are a key component, but specifics about which ones are included are not detailed.
  • The objective lens size, while beneficial for brightness, could make it more susceptible to external impacts compared to smaller models.
  • Optimal resolution from ED optics and Lanthanum Crown glass may require high-quality eyepieces and stable viewing conditions.

Frequently Asked Questions

The Pentax PF-100ED spotting scope features a large 100mm objective lens, designed for bright viewing in various lighting conditions.
Yes, it incorporates Extra Low Dispersion (ED) optics with Lanthanum Crown (rare earth) glass elements for optimum resolution and reduced optical aberrations.
Yes, this scope is designed to accept all standard 1 1/4-inch interchangeable telescope eyepieces, offering versatility.
Yes, the spotting scope is waterproof, fogproof, and nitrogen filled, making it durable and reliable for use in challenging weather conditions.
It utilizes XL telescope eyepieces, which are renowned for their sharpness, wide field of view, excellent contrast, and freedom from aberration.