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BST 1.25" Telescope Polarizing Filter Set with 1.25" Eyepiece Holder

5.0 (2 Reviews) Read Reviews Write Review
Brand BST
Part Number OFIL-BS-PFS1
Availability available

Product Info

Manufacturer Description

While observing the moon or planets, there is often too much light that washes out subtle details. This glare can be cut back using neutral density filters or polarizers. Polarizers are also helpful for splitting binary stars by reducing glare and diffraction around the brighter star of a binary pair.

The variable polarizing filter makes this even better by stacking two 1.25" polarizing filters together. By rotating the two elements, light transmission can be varied between about 2% and 40%. This filter retains true color balance since all wavelengths are transmitted uniformly over the entire spectrum.

This BST StarGuider polarizing filter also includes a very handy, short profile 1.25" eyepiece tube. The two filters are attached to this tube, allowing you to quickly change eyepieces without having to screw/unscrew the filters to individual eyepieces. However, the addition of this adapter requires about 1" of additional in-focus travel to compensate for its length in the optical path. Also, note that the inside depth of this tube is only 14mm (0.55") so your eyepiece will stick out by a bit if its 1.25" barrel is longer than this.

The two polarizing elements can also be unscrewed to obtain two polarizing filters (see photo 2) which can be used for day time photography or to improve contrast in images when only a little reduction in transmitted light is desired. The filters have a standard 1.25" thread (M28.5 x 0.6) so they can be screwed on to any virtually any standard 1.25" eyepiece or accessory.

Specifications:

  • Total length = 41.6mm (1.64")
  • Clear aperture = 27.0mm (1.06")
  • Weight = 1.2oz.
  • Made in China

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 William H.
      1491572368
      Apr 7, 2017

      5.0 Variable polarizer set

      Pros:

      Cons:

      Comments:

      If you need a moon filter, why buy anything but a variable filter set? These two filters can be used together or separately and eyepieces can be changed without affecting the degree of filtration. It works very well.

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

      Skill Level
      Unknown
      Time with Product
      Unknown
      User Notes:
      Review by Jim of Philadelphia, PA.
      1386028800
      Dec 2, 2013

      5.0 Excellent Product

      Pros:

      Easy to Use,Quality Lenses,Compact,Accurate,Lightweight,Strong Construction

      Cons:

      Comments:

      Great product! I am able to change eyepieces without readjusting filter.

      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

      Manufacturer BST