I picked up your thread on cameras.
We are based in Wareham. and are leaders in night vision for marine applications. I was interested to see that the sony camera has lasted so long without a proper housing. Trouble with zoom cameras is that they need line of sight stabilisation, which can be expensive. The slamming of ribs also seriously effects the sensor response. The sony low light works at about 0.1 lux our seamoon works down to 0.00015 lux ! Ours is filled with dry nitrogen and classed as ip69 down to 10 metres. Casing is marine 316 l stainless and uses mil spec connectors. It is a serious piece of kit, we reckon it needs to be if you are using it a heavy marine environment.
Flir make thermal imagers and do a cheapy that is also used on BMW for about £3000. However it does have its reliability problems and the picture is not very good. The casing is made in china by the thousands and tends to leak in heavy seas.
If you want a video please contact us on Sales@seenite.com
, we supply to the RNLI and d UK mod and all those woderfull superyachts.
ps If you can run to a FLIR unit We could get hold of one for you with a small discount.