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SVBONY 2" CLS City Light Suppression Light Pollution Broadband Filter Suitable for Visual & Astronomical Photography

Product Description

Description The SVBONY City Light Suppression broadband filter is designed to
improve the visibility of various Deepsky objects. By selectively
reducing the transmission of wavelengths of light pollutants,
specifically those produced by artificial lightings 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). Together with the highly transparent in main
nebula emission lines at OIII(496nm and 500nm), H-beta (486nm),
NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter
is suitable for enhancing the contrast and details for both visual and
photographic purpose at sub-rural area.

Features:

  • Multi-layers anti-reflection coating
  • Non-cementing optical substrate coating
  • Electron-beam gun evaporation with Ion-assisted
    deposition coating technology for durability and resistance to
    scratching, as well as stability on CWL (central wavelength) no
    deviation affected by temperature change.
  • Planetary rotation system offers precision and
    homogeneity of coatings ensuring high value on transmission of pass-band
    and Optical density of off-band.
  • Ultra-thin filter cell minimize vignetting by maximize possible
  • Aerometal Material Precise CNC Machining Sand Blasting
  • Process Black Anodized Finish Extinction Treatment to
  • Prevent Reflection Laser Engraving No Fading
  • 90% transmission of main nebula emission lines (i.e. Ha 656nm, OIII 496nm&500nm, SII672nm and H-beta 486nm).
  • 0.1% transmission of off-band, specifically the major
    emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nmand
    578nm).
  • Suitable for color CCD cameras and unmodified DSLRs
  • CLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.
  • Light pollution filter do not eliminate the effects of
    light pollution or increase the object ' s brightness. In many cases,
    they increase the contrast between nebula and night sky, not brightening
    the nebula.
  • WARNING: The filters of SVBONY are not designed for
    sun observation. DO NOT LOOK AT THE SUN WITH SVBONY FILTER. You would be
    BLIND if you fail to observe the warning.

Specifications:

  • Brand: SVBONY
  • Type: City Light Suppression Filter (CLS Filter)
  • Material: Optical glass lens, Aluminum Frame
  • Shape: Round
  • Thread: Standard M48*0.75mm
  • Net Weight: 5.2g / 0.18oz

Package Includes

  • SVBONY 2"CLS Filter
  • Sturdy Plastic Case

 

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Payment

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Shipping


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  2. We strive our best
    to provide you the most reliable, affordable way of shipping service.
    But sometimes international delivery is highly depended on the Courier
    Company and local customs/duties. If you do not receive your item on
    time, please contact us immediately for further assistance. Thank you
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  4. A:Overseas Warehouse Local Dispatch

    • From US Local Dispatch: USA: 2-6 business days .
    • From AU Local Dispatch: AU:2-6 business days.

    B:Chinese Domestic Dispatch

    Country
    Delivery Time

    Working Days(not including holiday)
    5-7
    8-11
    12-14
    15-19
    20-22
    >22

    Working Days+Saturday+Sunday
    5-9
    10-15
    16-20
    21-25
    26-30
    >31

    United Kingdom
    Rate(item arrived)
    9.9%
    63.2%
    19.1%
    3.4%
    4.4%
    Refund

    Australia
    Rate(item arrived)
    21.4%
    50%
    14.3%
    7.2%
    7.1%
    Refund

    France
    Rate(item arrived)
    10.5%
    28.6%
    43.8%
    10.1%
    7%
    Refund

    Germany
    Rate(item arrived)
    11.1%
    22.2%
    30.3%
    20.9%
    15.5%
    Refund

    Canada
    Rate(item arrived)
    0%
    47.1%
    31.4%
    17.6%
    3.9%
    Refund

    Spain
    Rate(item arrived)
    3.5%
    25%
    47.9%
    12.9%
    10.7%
    Refund

  5. 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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Returns

  1. All items in our shop are covered by one year warranty.
  2. We stand behind
    every product we sell. If you're not pleased with your purchase, we'll
    be happy to make an exchange or refund the product price less S&H
    within 30 days of your purchase via parcel post.
  3. Please contact us before you return the item, we will offer you the right return address
  4. For any exchange
    or refund, we need the product must be in its original receipt,
    including the box, packaging and all the accessories.
  5. Buyers are responsible for the returning shipping cost. Shipping and handling charges are not refundable.
  6. Refund and
    replacement: Once the carrier has received your item, Please allow up
    to 10 business days for returns to be processed.
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