Archive for November, 2008
Canon Camera Basic Guide Flash metering – E-TTL system
Otherwise known as the Evaluative Through the Lens System, the E-TTL system was introduced in 1995 with the debut of the Canon Elan II/50 Camera. Even if the metering process is still done through the lens of the Camera, the E-TTL system is a more advanced system and operates on dissimilar system to that of the TTL system. In addition, the E-TTL system is not backward compatible. The E-TTL system functions by firing a pre-flash, whose brightness is known, from the flash unit to ascertain the exact level of flash exposure. This is achieved by measuring the pre-flash light which is reflected off from the scene. The camera then calculate the correct flash pulse to get a mid tone level on the subject.
Secure Your Things With New Inventive Tool Called Hidden Cameras
Concealed spy cameras have become very fashionable in modern years with business holders, law enforcement officers and parents. Business owners often use surveillance system and spy cameras to keep an eye on employees or their store to Protect the private stuffs from theft or abuse. Spy cameras are used by the police to [...]
