01-06-2012, 01:58 PM
[quote name='Brightcolours' timestamp='1325850720' post='14394']
It is the position of the sensor elements on the sensor that influences how they are rated.
Lets take a look at the EOS 7D sensor to get an idea of how things are put together.
It is a real-estate issue... They improved the AF system to get it very sensitive and accurate, but they did not find the space to fit f8 in that configuration too.
No images available (yet?) for the D4 AF sensor configuration.
[/quote]
Thanks for the valuable input BC. With your explanation and http://www.dougkerr.net/pumpkin/articles..._Prism.pdf
article i come to concluion that modern camera have two rangefinders with different "baselines" - one for 2,8 baseline and another for modest aperture. However this makes split priusm and af sensor design difficult.
It is the position of the sensor elements on the sensor that influences how they are rated.
Lets take a look at the EOS 7D sensor to get an idea of how things are put together.
It is a real-estate issue... They improved the AF system to get it very sensitive and accurate, but they did not find the space to fit f8 in that configuration too.
No images available (yet?) for the D4 AF sensor configuration.
[/quote]
Thanks for the valuable input BC. With your explanation and http://www.dougkerr.net/pumpkin/articles..._Prism.pdf
article i come to concluion that modern camera have two rangefinders with different "baselines" - one for 2,8 baseline and another for modest aperture. However this makes split priusm and af sensor design difficult.