UFO's alt science ultra-violet lens and high-speed film

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Hi DeDukshyn and all, I found the you-tube containing 'Invisible photography' it is by David Sereda and and Trevor, James Constable.
I'm sure most here have seen this film content before but for those who haven't, please enjoy and ponder.

The bottom film is a whole film on the subject covering it's many aspects.

At vid points 5:19 and 7:16 David in the you-tube below, first mentions ‘Invisible Photography’ as used by NASA and Trevor, James Constable.

David Sereda Presents Reverse Engineered: How Alien Technology Could Solve World Crisis


https://www.youtube.com/watch?v=2bWWx-zqoTg

camera with him, fitted with an ultra-violet lens and high-speed film


The Invisible Realm Trevor James Constable Granada Forum 2008
https://www.youtube.com/watch?v=w9Klm5v8hco

David Sereda gives full commentary on the film and it’s invisible photograrphy.


UFO SECRET: FROM HERE TO ANDROMEDA - HD FEATURE


http://www.youtube.com/watch?v=T5lCAwHL0cc

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Addition: I realise I was originally thinking of some vid/info talking about UV vid cameras ? anyone know of this, it's not main stream tech.