Pertinent Pertinent was an Australian monthly periodical edited by Leon Batt. Contributors included Ian Mudie, Kylie Tennant, William Hart-Smith, the artist Rosaleen Norton and the poet Gavin Greenlees, Dulcie Deamer, Yvonne Webb, George Farwell, Marjorie Quinn, Marien Dreyer, and Robert Crossland Started in 1940 the magazine ceased publication in 1947.
Part of the Microprocessors glossary: Transistor-transistor logic (TTL) is a digital logic design in which bipolar transistor s act on direct-current pulses. Many TTL logic gate s are typically fabricated onto a single integrated circuit (IC).
TTL means through the lens. Flash metering is through the lens, using the camera's metering system, which looks through the lens you're using. Non-TTL means the flash doesn't communicate with the camera in that way, and instead uses its own light metering system, built into the flash. TTL is better!lkka wrote: It is a bit simplistic to just say that 'TTL is better', because all studio flashes are not TTL and are often quite obviously better sources of light than a small flash unit made by the camera manufacturer.. TTL is a flash metering technology for cameras-not camera lighting.