G3YNH.info Optics, Imaging &

 About these articles .

General Interest

 Glossary of Photographic & Technical Terms.

Camera Starting out in Underwater Photography .

 Natural vs. Artificial Light in UW Photography.

 UW Lighting Technique .

 sweetlips Pictures (general and underwater).

nik5 A Brief History of the Nikonos Camera System.

Optics & Imaging

  Ports & lenses .

  Refraction & Snell's law rainbow

 Optical Magnification

   Angle of Coverage (field of view).

Image Radial Correction (computer correction for lens defects).

  Flat port vs. dome port .

Compact Compact Camera, in Air vs. Underwater (with flat port) (Canon S100).

 Optical Characteristics of the Flat UW Lens Port .
OO  Flat port calculations: mp_calcs.ods (open document spreadsheet, requires OpenOffice).

Finding the Focal Point of a Dome port .
pdf PDF version .
OO  Dome port calculations: dp_calcs.ods (spreadsheet, requires OpenOffice).

WA  Underwater wide-angle converters test

LCD screen magnifiers .

Polaroids polartisation of light .

Pixels & resolution .

Image sensor formats .

Camera resolution comparisons.

film Film Copying (slide duplication).

 Engineering & Maintenance

UW housing maintenance .

Drops IP ratings .

O-ring Japanese O-rings .

 Depth compensating flexible camera housing  .

pdf Photoflash fundamentals (2006)

Flash tubes .

Mullard flash tube advertisement (1951).

TTL flash interface connections (2004).

ics5 Underwater connectors (2012).

 Analog TV and Video standards (now mostly of historical interest)

Web links:

Kaye & Laby online (see particularly section 2.5 Radiation and Optics).
Jenkins & White. Fundamentals of Optics.
Scubageek.com .
Sam's strobe FAQ .
 Jonz Valve Pages (Vintage TV equipnent).

G3YNH.info CU Cameras Underwater