Tamron 15-30 f2.8 for underwater photo?

Hi all,
I'm looking for a WA lens with Nikon mount good for sharks, mantas and so on. I read several good reviews about Tamron 15-30 f2.8 but none related to underwater photography. Out of the water it seems slightly better than Nikkor 16-35 f4. Do you have infos about it? I the fixed hood a drawback? Do you advice another lens?
Thank you very much

No idea but heard Tamron's have poor quality control vs other brands (some might be soft). Worth checking with your housing manufacturer if they've tested the lens and figured the proper size dome extension ring. Otherwise doing the measurements yourself for an extension would be challenging. Lenses need to be carefully aligned with domes.

If it has a built in hood, it may not fit in a dome. Though all rectilinear super-wide lenses really should be used with large 9"/230mm domes.

Also, as we've seen with Nikon's 14-24mm vs 16-35mm, lenses considered 'better' above water may not be so underwater.

Cheers,

Chris