Below are a few excerpts from a terrific UK site by Darren Meldrum TV Test patterns from around the world. Darren’s site includes test patterns from the BBC, Australia, Singapore, Ireland, Sweden, North America and lots more.
Probably the most famous American B&W test pattern is the so-called “Indian Head” monoscope pattern. This pattern was originated by RCA in 1939; it was designed to be generated using a special tube called a monoscope, a CRT which had a metal plate target on which the pattern was printed. The black lines of the pattern would interrupt current flow as the pattern was scanned to provide the desired video output. These tubes could only handle black and white – no shades of gray hence they had to be simulated either with a halftone dot pattern or with patterns of fine lines.
This NBC test pattern is dated 1947 but actually dates back to 1941, when commercial TV broadcasts began in America.
This is the 16:9 PAL version of the Philips PM5644 test pattern as used by BRT, the Dutch-language Belgian broadcast organization.
(Note: The original video has been removed. This shows the same idea.) Photographing light trails at night has been a popular technique of both still photographers and videographers. We’ve all seen the light trails of night traffic in a time lapse video. Light painting in still photography can be done a couple of ways. One […]Read More
DriverSavers is offering free data recovery service for victims of Hurricane Harvey and Hurricane Irma who have water damaged devices resulting from the flooding. Because exposure to water and air cause corrosion on electronic circuitry, they have set deadlines for these devices: September 15th for Harvey devices and September 30th for Irma devices. There is […]Read More
The Sigma 200 – 500mm with a Nikon F mount is an amazing lens. It has an aperture of F2.8 at the 500mm end and F5.6 at the 1000mm focal length. It’s a heavy one at 35 pounds. It’s pretty amazing. The only real catch I see is its price : $25,999.00. The customer reviewers […]Read More