"Icoz, Evrim" schrieb: > > This is what I wonder: > > I understand that camera picks the rigth EV based on whatever the algorithm > it has (center weighed, spot, evaluative whatever). But after that, how does > it decide which combination of aperture and shutter speed? >
It is a rather simple algorithm AFAIK. Starting at low EVs, it will first use maximum aperture until the shutter speed is shorter than 1/focal length. Then both, shutter speed and aperture are changed at the same rate, 1 EV more light means a half stop for both aperture and shutter speed. This continue until one of both variables reaches its limit. The only special thing about it is the use of the actual focal length of the lens. Thomas Bantel * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
