The First Photo
Kirt's Cogitations™ #33

RF Cafe University "Factoids," "Kirt's Cogitations," and "Tech Topics Smorgasbord" are all manifestations of my ranting on various subjects relevant (usually) to the overall RF Cafe theme. All may be accessed on these pages:

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37

< Previous Next >

The First Photo

Joseph Nicéphore Niépce made the first photograph on record in 1826. He captured a crude image of his south France country estate by coating a pewter plate with an asphalt called bitumen of Judea, which hardened when exposed for along time to the sun's rays. The camera was of the pinhole type, since optics had not yet been applied to cameras. After 8 hours of exposure, the plate was washed with a mixture of oil of lavender and white petroleum, leaving the faint image of his courtyard in relief. Visible in the photo are rooflines of nearby buildings, trees, and the horizon, complete with shadowing.

KR Electronics (RF Filters) - RF Cafe Website

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
AirplanesAndRockets.com

My Daughter's Website:
EquineKingdom