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Engineering Articles

General
Ingress protection and water resistance ratings (IP and JIS)

Japanese (JIS B2401 series) O-ring specifications.

Underwater photography related patents.

Video & TV
World Analog TV and Video Standards TV standards by country.

Photographic Flash
See also: Flash compatibility issues in digital stills photography in general articles section.

Photographic flash, technical introduction.

Relationship between guide number, capacitance and voltage.

The Nikonos, Nikon (Analog), and Ikelite TTL Flash Interfaces

Sea & Sea TTL Interface.. Adapter: S&S Camera to Ikelite/Nikon Strobe.

Old underwater strobes: Technical Info.

Old flash tubes.

Links to more flash information (see also patents):
Camedia TTL, digital slaves, E-TTL: http://www.heinrichsweikamp.net/blitz/indexe.htm.
mike-dive (in German): http://www.mike-dive.de/ .
Sam's strobe FAQ: http://members.misty.com/don/samflash.html
EOS Documentation Project: http://eosdoc.com/index.asp