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Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long
Top-Down Porthole, Extra Long

Top-Down Porthole, Extra Long

48 reviews
$ 49.99

Take great photos of your aquarium from the top down, the way corals are meant to be viewed!  This handy lens housing mounts directly to the barrel of your DSLR lens, allowing you to (carefully) dip the housing in the water and get tack sharp photos without annoying lightbulb reflections or surface ripples.  Using the three thumbscrews to mount the housing on the lens barrel, you can turn the housing to zoom the lens, which can be difficult with traditional top-down photo boxes.

The Porthole features a silicone band for extra grip, and lens standoffs to protect the acrylic from scratches when set face-down.

Inner diameter of the housing is approximately 4" and supports a wide range of lens sizes.  The housing length is 7" overall, and the barrel depth is 6-3/8" to the inside of the acrylic lens.   This allows compatibility with external-focus/zoom lenses and large macro lenses.

Many thanks to our friend Chris Thomas (143gadgets) for the photos taken with the Porthole.  As a professional photographer, he has provided us with valuable feedback during the product's design.

Customer Reviews
4.9 Based on 48 Reviews
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RD
11/24/2020
Roy D.
United States United States
Great for pictures

The extra long is great for pictures of corals on the sand and back of a wide tank

SV
11/24/2020
shawn v.
United States United States
Great product

Everything i have ever gotten from you get from you guys is always great!

DB
11/22/2020
Domenic B.
United States United States
Totally satisfied

Always a good experience purchasing from avast. Quality products.

AG
10/11/2020
Alex G.
United States United States
Great product - Would like to see a pro verson

Using the porthole was easy to attach to my camera lens. In my case I secured the porthole to the manual focusing ring so I could focus by twisting the porthole. The only drawback to this product is ensuring that you do not scratch the acrylic lens.

Avast Marine Works Top-Down Porthole, Extra Long Review
DD
08/10/2020
Dan D.
United States United States
Super solid - definitely recommend.

Build quality is top-notch. Exactly what I was looking for and I'm super stoked to take great close-ups under water of my SPS collection now.