I've got two by Dino Brugioni, who was part of the team that analyzed the Russian missles in Cuba during the cold war Cuban Missle crisis.They would look at the length of shaddows to calculate sun location, or if they had the sun location, use the shaddows to calculate height and other distances.The vast majority were taken in the early to late 90s.

Photography as a medium is less than 200 years old.

But in that brief span of history, it has evolved from a crude process using caustic chemicals and cumbersome cameras to a simple yet sophisticated means of creating and sharing images instantly.

German scientist Johann Heinrich Schulze conducted the first experiments with photo-sensitive chemicals in 1727, proving that silver salts were sensitive to light.

But Schulze didn't experiment with producing a permanent image using his discovery. On a summer day in 1827, French scientist Joseph Nicephore Niepce developed the first photographic image with a camera obscura.

Hope this helps someone else as I have searched on and off for a few years with no luck.

I found your site today (directed from another topic) and look forward to returning., Thanks Jand If you really want to get hard core, read the books on photo interpretation.

However, Niepce's process required eight hours of light exposure to create an image that would soon fade away.

The ability to "fix" an image, or make it permanent, came along later.

When Niepce placed the metal plate in a solvent, gradually an image appeared.

These heliographs, or sun prints as they were sometimes called, are considered the first try at photographic images.

Discover how photography has changed over time and what cameras look like today.