Optolong UBVRI Filter Set - 50mm Square Unmounted - UBVRI-50SQ is no longer available.

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This photometric UBVRI filter set by Optolong features five 50mm square unmounted filters:
  • Ultraviolet (U)
  • Blue (B)
  • Visual (V)
  • Red (R)
  • Infrared (I)
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  • Description

    Optolong UBVRI Filter Set - 50mm Square Unmounted

    This photometric UBVRI filter set by Optolong features five 50mm square unmounted filters, including ultraviolet (U), blue (B), visual (V), red (R), and infrared (I).

    The Optolong 50mm Square Unmounted UBVRI Filter Set is designed with Schott glass that is multi-coated with an ion-assisted deposition technology to preserve stability and scratch resistance on the central wavelength (CWL). This filter set is designed to be used in color filter wheels that accept 50mm unmounted filters in a square format.


    Quality Filter Materials:

    • Schott B260 substrate material from Germany, 3.0mm thick
    • Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition


    Optolong Filter Manufacturing Processes and Parameters

    • Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
    •  Surface quality, according to MIL-O-13830, is 60/40
    •  Optolong’s planetary rotation system is a homogenous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band
    • Each filter comes with a plastic case with high-pressure EVA case lining


    About Optolong

    Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design, and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.

    The image shows a round unmounted UBVRI filter set. You will be receiving a set of 50mm square filters.


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    What's Included

    • Optolong 50mm Square Ultraviolet (U) Filter

    • Optolong 50mm Square Blue (B) Filter
    • Optolong 50mm Square Visible (V) Filter
    • Optolong 50mm Square Red (R) Filter
    • Optolong 50mm Square Infrared (I) Filter
    • Filter Cases

  • Dimensions & Specifications

    • Filter Size: 50 mm

    • Filter Type: Wideband Imaging

    • Filter Shape: Square

    • Mounted or Unmounted: Unmounted

    • Filter Set Contents: Ultraviolet/Blue/Visible/Red/Infrared 50mm Square Unmounted Filters

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    Two Years

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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