05-14-2011, 09:37 AM
[quote name='Klaus' timestamp='1305294750' post='8292']
...
I don't know whether the G does that but technically it can close the aperture and focus thereafter. It just need to perform an contrast analysis of sensor data. The effective aperture should be rather irrelevant here (within limits depending on the light level).
[/quote]
Apart from the light gathering and the impact of this on CD, the contrast analysis by checking the daha of adjacent pixels on sensor would be different if the aperture was closed for a lens with RSA problem... Therefore I think having and advantage in terms of RSA requires closing of aperture right before performing AF... Or am I missing something?
Serkan
...
I don't know whether the G does that but technically it can close the aperture and focus thereafter. It just need to perform an contrast analysis of sensor data. The effective aperture should be rather irrelevant here (within limits depending on the light level).
[/quote]
Apart from the light gathering and the impact of this on CD, the contrast analysis by checking the daha of adjacent pixels on sensor would be different if the aperture was closed for a lens with RSA problem... Therefore I think having and advantage in terms of RSA requires closing of aperture right before performing AF... Or am I missing something?
Serkan