08-18-2010, 06:43 PM
[quote name='Brightcolours' timestamp='1282155590' post='1891']
Problem with a pellicle mirror: AF sensor can not be housed in the bottom anymore.
So, AF needs to move up.
Oops, the sensor will be there. So AF will have to be done via image sensor.[/quote]
The Sony method is believed to use the mirror for providing phase AF, with no OVF. EVF via main sensor only.
If the mirror really is fixed, the sensor could be in a sealed chamber where dust can't get inside in the 1st place. If the mirror can still flip, you could reach it as normal. However you do need to worry about cleaning the mirror if it is fixed, but at least it is far from the focal plane so any dust on it would become visible less easily.
Problem with a pellicle mirror: AF sensor can not be housed in the bottom anymore.
So, AF needs to move up.
Oops, the sensor will be there. So AF will have to be done via image sensor.[/quote]
The Sony method is believed to use the mirror for providing phase AF, with no OVF. EVF via main sensor only.
Quote:a hell of a time trying to clean the sensor.
If the mirror really is fixed, the sensor could be in a sealed chamber where dust can't get inside in the 1st place. If the mirror can still flip, you could reach it as normal. However you do need to worry about cleaning the mirror if it is fixed, but at least it is far from the focal plane so any dust on it would become visible less easily.
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