SKU: 79005587495

Bigblue 77mm Underwater Barrier Filter

Sale price$4666.50 Regular price$5185.00
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Description

Bigblue 77mm Underwater Barrier FilterFor 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 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

  • 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

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
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"
In the Box
Bigblue 77mm Underwater Barrier Filter
  • Filter Case
  • 1-Year Limited Warranty
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 79005587495

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4.4 ★★★★★
Based on 27 reviews
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Verified Purchase
Pat. H
New York, US
★★★★★ 5
Great cast iron enameled pot
Color: Red, Size: 5Qt
I love this pot. The first cast iron pot I got was not enameled and was supposed to be pre-seasoned. I tried to make steaks for our anniversary and they stuck something awful. I couldn't see the char against the black and scrubbed forever trying to get it off. After that I only get enameled pots with white or cream interiors. When you sear food it might stick but you can scrape the brown stuff off the bottom of the pan with a flat edged plastic or wooden spoon or spatula and it adds flavor to sauces. The pans also wash so much easier. If something doesn't want to come off you can just soak it in hot soapy water for a few minutes and it scrubs off. With the white or cream interior you can tell when you get the pot clean. Most can't be put in the dishwasher but they are easy to wash by hand. I also learned to cook at a much lower temperature than I did with my stainless steel cookware. The cast iron holds the heat so much better that it can get too hot if you use any temp over medium high. I still haven't figured out how not to burn minced garlic when I follow recipes. They always say to let the oil get hot until it shimmers but the garlic spatters something awful and quickly burns. Finally I did it my own way and put it in the pan before the oil gets too hot. The cast iron pot is heavy and on a glass surface cook top like mine you can't scoot it because it can scratch the surface. The handles get very hot too so you have to use hot pads, preferably silicone ones. The pot came with cute little teepee shaped hot pads that didn't really fit the handles well but fit the lid fine. This size is great for baking sourdough bread. Most recipes have you preheat the pot for an hour before adding the dough to bake. The lid fits tight enough to hold in steam from the dough to help the loaf develop a nice crust on it. I line the pot with parchment paper and the dough doesn't stick. You can also make soup and stews in this pot. It is safe on the cook top or inside the oven. I think the quality is good, but I'm not an expert on that. I know my pot hasn't shown any cracks or chips but I treat it carefully not exposing it to high heat when it is cold or a cold surface when the pot is hot so the glass enamel isn't exposed to temperature shock to avoid any cracking risk. Red is my favorite color and the pot looks great displayed on my cook top.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 31, 2025
G
Verified Purchase
G.
Omaha, US
★★★★★ 4
Heavy Smallish Handle Wonderful Dutch Oven
Color: Red, Size: 5Qt
As many have noted this lidded Dutch Oven is extremely heavy. But it cooks and cleans up beautifully, is well made and attractive. In my opinion the handles are relatively small for such a heavy pot, my one complaint. The mitts are cute but more decorative than truly protective as the handles are so small. Just be very careful picking up and moving the pot especially from the oven. I chose the red color which looked vibrantly cheerful in my white kitchen. The 5 qt capacity works for modest to regular-sized portions without second helpings for 4-6 people. However, if cooking for more people, want larger portions, 2nd helpings or leftovers, go with a larger pot. Overall, given its great construction, price, cooking performance, and attractiveness, this is a no-brainer purchase if you won’t mind relatively small handles and a heavy pot.
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Reviewed in the United States on January 24, 2026
S
Verified Purchase
Samantha Donaho
Battle Creek, US
★★★★★ 5
Perfect for sourdough
Size: 4.3 Qt, Color: Olive
Beautifully made. Great addition to my kitchen!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
E
Ella girl
Bozeman, US
★★★★★ 5
Heavy-Duty Dutch Oven That Easily Feeds a Big Family
Size: 6.0 Qt, Color: Clay, Size: 6.0 Qt, Color: Clay
I am extremely impressed with this Amazon Basics enameled cast iron Dutch oven. The first thing I noticed when I took it out of the box was how substantial and heavy it feels, which immediately gave me confidence in the quality. The clay color is beautiful and looks even better in person, and the enamel finish is smooth and well done. I have a large family, so I needed something with plenty of capacity, and this 6-quart size has been perfect for big batches of soup, chili, pot roast, and homemade pasta sauce. It heats evenly, retains heat exceptionally well, and keeps food warm for a long time after cooking. The lid fits securely and helps lock in moisture, which made a recent pot roast come out incredibly tender after several hours of slow cooking. The wide handles make it easy to move from the stovetop to the oven, and despite the weight, it feels very sturdy and well balanced. Packaging was excellent and everything arrived in great condition. Considering the quality, performance, and attractive design, this Dutch oven offers outstanding value for the price. If you're looking for a durable cast iron pot that can handle family-sized meals and perform like much more expensive brands, this one is an easy recommendation.
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Reviewed in the United States on June 2, 2026
B
BobCz
Natrona Heights, US
★★★★★ 5
Quality Baking, Not Just For Meat Anymore
Size: 6.0 Qt, Color: Clay, Size: 6.0 Qt, Color: Clay
Since my wife is an avid sourdough baker, requesting this Dutch oven was an easy decision. From the moment I unboxed it, the first thing I noticed was the substantial weight—a testament to its high-quality cast iron core. ​ Beyond its heft, the Dutch oven features a beautifully smooth finish on the interior and exterior that makes it look as good as it performs. My wife has already put it to the test with two loaves of sourdough. While the first loaf browned a bit too much on the bottom, the second attempt turned out absolutely perfect, proving that it just takes a little practice to dial in the heat distribution. ​ I am confident we won’t limit this piece to just bread baking; I can already imagine a delicious chicken or pot roast in its future. If you are looking for a top-tier cooking utensil, you really can’t do much better than this. It is exceptionally well-made and expertly finished. Whether you are a dedicated baker or looking to cook up a perfectly tender roast, you will be doing yourself a favor by adding this Dutch oven to your kitchen collection.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026

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