This little camera is quite pricey at £56 but it is claimed to be Sony CCD
Comes complete with a 28mm hole saw and is primarily made for bumpers so comes with a couple of angle tubular collars to adjust the angle.
[You must be registered and logged in to see this image.]Mine is going through the flat & vertically plumb rear wall so I discarded the spacers and to my delight realised it is now long enough to go right through the full 29mm thickness and still get the securing ring on.
[You must be registered and logged in to see this image.]I kept the piece of wall that I cut out for the external 230 volt socket as I knew it would be handy at some time even if only for dimensions or just to show people how the wall are constructed (Rapido)
The hole was straight forward making sure it goes through at 90 degrees!
[You must be registered and logged in to see this image.]The camera has it's own O ring so no sealant needed.
[You must be registered and logged in to see this image.]