Gopro Filter Mount

Hi all,

I do a lot of deep diving and wanted a filter for my Gopro (hero 5 session).
I already use this case for diving in order to keep my gopro safe and water proof (https://www.amazon.fr/holaca-plong%C3%A9e-%C3%A9tanche-appareil-Session/dp/B01K3XJB9E/ref=sr_1_2?ie=UTF8&qid=1539891509&sr=8-2&keywords=boitier+gopro+hero+5+session).

It was impossible for me to find a filter that can adapt to this waterproof case... So I created it.
It works fine with some CAMKIX red filter.

I know it