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OPTOLONG 1.25" Ultra High Contrast UHC Nebula Filter for Improve Visibility of Various Deep Sky Objects

Product Description

The Optolong UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep sky objects. It does this by: Selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lighting (including mercury vapor lamps, both high & low pressure sodium vapor lights, and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).Being highly transparent to the main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha(656nm) as well as SII (672nm).

Main Feature:

 

  • 1.25" astronomy filter with standard M28.5x0.6 male filter thread (no female thread, so it cannot be stacked with other filters).
  • Ultra-thin filter cell to minimize vignetting; clear optical aperture of 26mm.
  • Suitable for enhancing the contrast and details for both visual and photographic purpose at urban and suburban areas with heavy light pollution.
  • 95% transmission of main nebula emission lines.
  • H-beta 486.1nm, OIII 495.9nm and 500.7nm, H-alpha 656.3nm, and SII 672nm.
  • 0.1% transmission of major transmission lines of artificial light pollution.
  • Hg (Mercury) at 435.8nm, 546.1nm, 577nm, and 578.1nm.
  • Na (Sodium) at 598nm, 589.6nm, 615.4nm, and 616.1nm.
  • High quality protective plastic storage case.
  • Precision CNC-machined metal filter cell with sand blasted black anodized finish, anti-reflection treatment, and laser engraving.

Package Includes

  • 1.25" OPTOLONG UHC Filter

 

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shipping details

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A:Overseas Warehouse Local Dispatch

  • From US Local Dispatch: USA: 2-6 business days , other countries: 5-14 business days.
  • From UK Local Dispatch: UK: 1-5 business days , other countries: 3-8 business days.
  • From DE Local Dispatch: Deutschland: 1-3 business days , other countries: 2-5 business days.
  • From AU Local Dispatch: AU:2-6 business days.

B: China Domestic Dispatch

  1. CountryDelivery TimeWorking Days(not including holiday)5-78-1112-1415-1920-22>22Working Days+Saturday+Sunday5-910-1516-2021-2526-30>31United KingdomRate(item arrived)9.9%63.2%19.1%3.4%4.4%RefundAustraliaRate(item arrived)21.4%50%14.3%7.2%7.1%RefundFranceRate(item arrived)10.5%28.6%43.8%10.1%7%RefundGermanyRate(item arrived)11.1%22.2%30.3%20.9%15.5%RefundCanadaRate(item arrived)0%47.1%31.4%17.6%3.9%RefundSpainRate(item arrived)3.5%25%47.9%12.9%10.7%Refund
  2. You can pay extra shipping cost to get express delivery, such as EMS, DHL or UPS. It just takes about 5-10 business days to receive order, please contact us if necessary.

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    Feedback

    PushAuction

    On May-17-18 at 02:52:19 PDT, seller added the following information:

    DataCaciques

    Filed under: Eyepieces & Accessories