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BST 1.25" Flat Field Eyepiece - 19mm

5.0 (2 Reviews) Read Reviews Write Review
Brand BST
Part Number -
Availability available

Product Info

Manufacturer Description

Standard eyepieces provide sharp, pinpoint star images at the center of the field but as you look out toward the edges, stars often begin to get blurred and out of focus. Eliminating this distortion usually calls for expensive optical designs with additional lens elements to eliminate the field curvature. But these new BST eyepieces use a 5 or 6 element design that offers a flat field over the entire field of view at an attractive price.

Featuring large eye lenses, wide fields of view (from 53°-65°), and generous eye relief (from 9.6mm-24.4mm), these eyepieces are a pleasure to use. Fully multicoated lenses maximize light transmission and edge blackening of all lens elements ensures excellent contrast. Other features include safety recess grooves on the 1.25" barrels, standard 1.25" filter threads, and twist-up eyecups.

Reviews

5.0 (Based on 2 Reviews) 100% of reviewers recommended this product.
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    1. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Erin F.
      1538742449
      Oct 5, 2018

      5.0 Nice eyepiece!

      Pros:

      Cons:

      Comments:

      I got this eyepiece for the wider view and it’s stury construction. Gives great views. A bit of curvature with my f6.7 refractor, but tolerable. Agena’s service is great!

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

      This review was provided courtesy of AgenaAstro.com

    2. rainguy

      rainguy New Member

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by rainguy of Lake Oswego, OR.
      1369958400
      May 30, 2013

      5.0 SHARP AND SOLID!

      Pros:

      Quality Lenses,Strong Construction,Easy to Use,Accurate

      Cons:

      Comments:

      This eyepiece lives up to every claim in the Agena description. Sharp, crisp, bright and contrasty images edge-to=edge. Build quality, fit and finish are exemplary. A near perfect eyepiece for viewing open clusters. M44 never looked better.

      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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      Specifications

      Apparent Field of View 65°
      Barrel Size 1.25" (31.7mm)
      Bolt Case Included Yes - Free Agena Eyepiece Container
      Bolt Case Size Agena 52x80mm
      Coatings Fully Multi-Coated
      Height (with Eye Guard) 2.40" (61.0mm)
      Max Width 1.59" (40.5mm)
      End Caps 2
      Eye Lens Diameter 0.96" (24.3mm)
      Eye Relief by Design 18.5mm
      Field Stop Diameter 21.2mm / 0.83"
      Filter Threads Standard 1.25" Filter Thread (M28.5 x 0.6)
      Focal Length 19mm
      Lens Elements 5
      Lens Groups 3
      Rubber Eye Guard Yes
      Blackened Lens Edges Yes
      Manufacturer BST
      Eyepiece Focal Length 15.1mm - 20mm
      Eyepiece Field of View 61 - 70 degrees
      Eyepiece Series BST Flat Field
      Barrel Type With safety undercut
      Eyepiece Weight 4.10oz (116.23g)