Canon Pellix

Canon Pellix

In the mid 1960s through the lens exposure metering (TTL) was the new technology entering the SLR camera market. The Pellix was Canon's answer to that challenge. This technology was first successfully realised in a 35mm SLR camera in the remarkable Tokyo Kogaku KK Topcon RE-Super, launched in 1963, but followed by the Pentax Spotmatic a year later. Unlike the RE Super, the Pellix and the Spotmatic TTL exposure meter relies on stopping down the lens to measure the light, making the finder image dimmer. However, all have quite different approaches accomplishing the TTL metering, and Canon possibly the most unusual one, using a semitransparent stationary reflex mirror behind which a metering cell is raised during the reading. In October 2010, the Sony Corporation launched the Sony Alpha SLT-A55 based on the pellicle mirror principle, but now called the Translucent Mirror Technology.