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Vixen 1.25" HR High Resolution Eyepiece - 2mm # 37133

5.0 (1 Reviews) Read Reviews Write Review
Brand Vixen Optics
Part Number 37133

Product Info

Manufacturer Description


Vixen's HR-series eyepieces are designed for very high power observations of subtle differences of the surface of the planets. The high resolution eyepieces deliver breathtaking, superb images with extremely high level of definition and contrast when used under suitable conditions and with the right equipment*.

Approx. 100% Strehl ratio on the axis

The resolving power outperforms similar eyepieces designed for planetary viewing. The HR-series maintains more than a 97% Strehl ratio to the edge of the field of view when combined with a Vixen AX103S refractor. In comparison, the ratio is about 90% with the use of a standard LV2.5mm eyepiece.

Suitable for Newtonian telescopes with fast primary mirrors

The HR-series work extremely well with the Vixen R200SS telescope as it has the ability to correct coma aberration. Even at the edge of the field of view, the HR-series have a 93% Strehl ratio. In comparison the Strehl ratio with use of the LV2.5mm falls rapidly as the viewing object is moved toward the edge of the field of view. The ratio is only 93% at a fifth from the center and 0% at the edge. Conventional eyepiece specifications merely show the performancewhen an object is put in the center of the field of view of the eyepiece. As a result, the resolving power declines as you move toward the edge of the field of view. The HR-series are best suited for observing the surface of the moon to extend your view to the entire field of view.

Simple 5 elements in 3 groups lens design

While most eyepieces are constructed from 7 or 8 lens elements, the Vixen HR-series eyepieces are constructed with 5 lens elements design to achieve the largest possible transmission of light. The absorption and reflection of light are virtually eliminated.

Enhanced light transmission characteristics

The Vixen AS-coating achieves extremely high light transmission of 99.9% per lens surface. It is appliedto each of the surfaces to deliver extremely high contrast images.

Complete stray light correction

The grooved lens frame construction contributes to the reduction of stray light. The inside of the eyepiece is perfectly threaded and blackened to prevent deterioration of the image from stray light. The inner baffle rings effectively stop any stray light. Even a hint of reflection which might occur on the tip of the sleeve is eliminated.

Quality product that is Made in Japan.

 * Important Agena Note: Depending on your telescope, this eyepiece may provide magnifications that are too high! While it can be very useful for viewing the Sun, Moon, brighter planets and terrestrial objects, it is not for everyone or for common viewing conditions. To get the most out of this eyepiece, you will need to have high quality telescope optics and very good seeing conditions.

Manufacturer part number: 37133


5.0 (Based on 1 Reviews) 100% of reviewers recommended this product.
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      Review by DAEWON K.
      Sep 11, 2018

      5.0 It is a very well made eyepiece.




      It feels like Zeiss Ortho.
      Looking at the APM 152mm, the surface of Jupiter can be seen in detail. It was the best Jupiter I have ever seen.

      Bottom Line: Would you recommend this item? Yes
      Was this review helpful? Yes / No

      This review was provided courtesy of AgenaAstro.com

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      Apparent Field of View 42°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Manufacturer Supplied
      Bolt Case Size Replacement: Agena 42x80mm
      Coatings AS-Coated
      Eye Relief by Design 10mm
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 2mm
      Lens Elements 5
      Lens Groups 3
      Eyepiece Weight 4.10oz (116.23g)
      Manufacturer Vixen Optics
      Eyepiece Focal Length 5mm and Under
      Eyepiece Field of View Up to 50 degrees
      Eyepiece Series Vixen HR
      Barrel Type Tapered barrel