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BST 1.25" Variable Transmission Polarizing Filter

4.5 (6 Reviews) Read Reviews Write Review
Brand BST
Part Number OFIL-BS-VPOL1
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. The variable polarizing filter makes this even better by stacking two polarizing filters together and combining them with a special ring that prevents the two individual filters from getting separated during normal use. 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.

The two polarizing elements can be unscrewed to obtain two polarizing filters 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 filter has a standard 1.25" thread (M28.5 x 0.6) so it can be screwed on to any virtually any standard 1.25" eyepiece or accessory.

Specifications:

  • Total item length (including external male thread) = 22.6mm (0.89")
  • Clear aperture = 27mm (1.06")
  • Weight = 0.5oz.
  • Protective plastic storage case: Included
  • Made in China

Reviews

4.5 (Based on 6 Reviews) 100% of reviewers recommended this product.
Rating Distribution
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    1. Guest

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      User Notes:
      Review by Celso A.
      1537188660
      Sep 17, 2018

      5.0 Excellent

      Pros:

      Cons:

      Comments:

      Excellent

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

      This review was provided courtesy of AgenaAstro.com

    2. Guest

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      User Notes:
      Review by Алексей Т.
      1518404927
      Feb 11, 2018

      5.0 good

      Pros:

      Cons:

      Comments:

      good

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

      This review was provided courtesy of AgenaAstro.com

    3. Guest

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      Review by Rafael C.
      1507041782
      Oct 3, 2017

      5.0 Very Sayisfied With Purchase

      Pros:

      Cons:

      Comments:

      Very Sayisfied With Purchase

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

      This review was provided courtesy of AgenaAstro.com

    4. Guest

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      User Notes:
      Review by Edward H.
      1503671286
      Aug 25, 2017

      4.0 BST 1.25" Variable Transmission Polarizing Filter

      Pros:

      Cons:

      Comments:

      Much more comfortable viewing on the moon with this filter. I found it works best by attaching half to a barlow and half to an eyepiece. That way i can rotate eyepiece to vary the light transmission. Filter seems well made and does pretty much what i expected. Very satisfied with purchase.

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

      This review was provided courtesy of AgenaAstro.com

    5. Guest

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      User Notes:
      Review by TaterITS of Mississippi.
      1444608000
      Oct 11, 2015

      4.0 Its Polarizing

      Pros:

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

      Cons:

      Comments:

      Would like just a little slip-friction between the two. Once set, it is too easily moved..

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

      This review was provided courtesy of AgenaAstro.com

    6. Guest

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      User Notes:
      Review by danr19 of Buenos Aires, Argentina.
      1435363200
      Jun 26, 2015

      4.0 You can adjust it for each moon's phase

      Pros:

      Easy to Use,Compact

      Cons:

      Comments:

      I use it mainly for the Moon.

      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