In 2018 I had upgraded to a Subal D850 underwater housing and even managed to get a Nikonos 13mm retrofitted, but then never got time to dive. A shame, truly. Well I finally got the rig underwater and was amazed at the quality of this Nikonos 13mm! Also probably the most difficult lens I've ever used - not in any technical aspects, just in trying to get close enough to the subject! So I've been working hard on improving my scuba skulking abilities...which is easier at night. Found this porcupine puffer floating around the reefs of Cane Bay in St Croix and was able to swoop in, snap off a few shots, and let it carry on with its night.