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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

44 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 44 Reviews
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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.

CL
06/03/2020
Carlos L.
United States United States
Great product

Excelent products cuality material

Avast Marine Works Top-Down Porthole, Extra Long Review
CM
05/23/2020
carlos m.
United States United States
Top down xl long porthole

Great product fast delivery no complaints porthole works great so far

Avast Marine Works Top-Down Porthole, Extra Long Review
JS
05/06/2020
Jose S.
United States United States
Ease your worries.

This takes a huge concern off the table of getting your expensive equipment wet. Very study and easy to use

TH
04/02/2020
Timothy H.
United States United States
Excellent purchase

Easy to use. Excellent for underwater photography.

Avast Marine Works Top-Down Porthole, Extra Long Review