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Bigblue 77mm Underwater Barrier Filter

Bigblue 77mm Underwater Barrier Filter

Bigblue 77mm Underwater Barrier Filter

B&H # BIYF77MM MFR # YF77MM
Bigblue 77mm Underwater Barrier Filter

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Ship Time: 7-14 business days 

Product Highlights

  • For Fluorescent Fish and Coral Images
  • Use with Blue or UV Excitation Light
  • Blocks Blue or UV Excitation Light
  • Fluorescence from Excitation Can Pass
  • 4x to 8x Filter Factor, 2 to 3 Stop
  • Acrylic Construction
  • Thin, Aluminum-Alloy Filter Ring
  • Plastic Case
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Size: 77mm

58mm

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62mm

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67mm 77mm

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You Pay: $36.95

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Overview
  • 1Description

The 77mm Underwater Barrier Filter from BigBlue is designed to help capture images or video of fish or coral that emit fluorescence while being exposed to a blue or UV excitation light.

Fluorescence is a process that begins with chemical compounds called fluorophores as they absorb light energy from an outside source. Atoms and molecules within the fluorophores then emit their own light at lower energies and wavelengths that correspond to the original light source, making the fluorophores appear to glow. The proteins in many fish, coral, or other underwater life contain fluorophores, creating the opportunity for unusual or unique images. Since blue or UV wavelengths with their relatively high energy levels can yield the most intense fluorophore reactions, blue or UV light sources are considered ideal for producing the most colorful and easy-to-photograph fluorophore effects.

However, because the light from a blue or UV lamp used to excite the atoms and molecules within the fluorophores is more intense than the lower-energy fluorophore glow, such lamps can end up obscuring that glow from fish or corals while trying to photograph them. The Bigblue 77mm Underwater Barrier Filter makes it possible to capture images of fluorescing underwater life by blocking the light from a blue or UV excitation light being used to provide the energy needed to initiate the fluorophore reaction while allowing the resulting glow into your lens and camera.

This filter is designed with the ability to be used on a camera lens within an underwater housing. It is constructed from acrylic and features a thin, aluminum-alloy filter ring for durability while remaining lightweight.

  • Blocks blue or UV light used to trigger fluorescent glow in fish, coral, or underwater life while allowing that fluorescent glow to be photographed or recorded
  • Can be used on a camera lens within an underwater housing
  • 4x to 8x filter factor reduces exposure by 2 to 3 stops
  • Constructed from acrylic with thin, aluminum-alloy filter ring
  • Plastic filter case for storage and transport
In the Box
Bigblue 77mm Underwater Barrier Filter
  • Filter Case
  • 1-Year Limited Warranty
  • Table of Contents
    • 1Description
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    Specifications
    Type Fluorescence barrier
    Size 77 mm
    Filter Factor 4 to 8 (2 to 3 stop)
    Effect Blocks rays from a blue or UV excitation light used to trigger fluorescence in various fish or corals while allowing the resulting fluorescence to pass through
    Construction Acrylic
    Front Filter Thread Size None
    Front Lens Cap Size 80 mm (push-on)
    Packaging Info
    Package Weight 0.1 lb
    Box Dimensions (LxWxH) 3.7 x 3.6 x 0.8"

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