09-23-2010, 03:52 PM
[quote name='wim' timestamp='1285256661' post='3174']
Thank you for that extensive explanation, Brightcolours.
I do think however that in the case of Canon the slow C-AF is mainly due to the fact that Canon cameras just aren't optimized to do this type of sensor-based AF yet. If I see how the 85L II focuses f.e., I think it should be very feasible to use the same mechanism for C-AF without a problem, and faster with any other USM lens, provided the camera has a good C-AF system which can operate, ideally, independent from the way the sensor normally works.
Kind regards, Wim
[/quote]
If you look at for instance a G10/11/12... they use exactly the same imaging/computing core, which also manages the contrast AF from the imaging sensor (Digic). So it is not that... Canon has contrast detect AF from the imaging sensor + Digic computer covered well.
Thank you for that extensive explanation, Brightcolours.
I do think however that in the case of Canon the slow C-AF is mainly due to the fact that Canon cameras just aren't optimized to do this type of sensor-based AF yet. If I see how the 85L II focuses f.e., I think it should be very feasible to use the same mechanism for C-AF without a problem, and faster with any other USM lens, provided the camera has a good C-AF system which can operate, ideally, independent from the way the sensor normally works.
Kind regards, Wim
[/quote]
If you look at for instance a G10/11/12... they use exactly the same imaging/computing core, which also manages the contrast AF from the imaging sensor (Digic). So it is not that... Canon has contrast detect AF from the imaging sensor + Digic computer covered well.