Rick Burnett
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Wow, never did the math but you're right. As a simple comparative measurement, if the sensor was 9x9, they skip two out of every three rows, so only 3 rows. Then, skip 2 out of every 3 pixels. 3x3 = 9, so the used pixels in this example are 9/9x9 or 1/9 = 11% used out of the sensor.
Two things that are important to realize here:
For the 7D to even have the raw data of all pixels to do a full down convert to 1080p, it has to work with almost 9x the amount of data. That is ALOT. Given the fastest you can aquire I think is 8fps, in reality they need 3x to 4x minimum faster speed whatever the limit is (could be the sensor, could be the processors) to get to 24 or 30fps.
Now think of this, the scarlet fixed can do 150fps burst and 120fps sustained!
Two things that are important to realize here:
For the 7D to even have the raw data of all pixels to do a full down convert to 1080p, it has to work with almost 9x the amount of data. That is ALOT. Given the fastest you can aquire I think is 8fps, in reality they need 3x to 4x minimum faster speed whatever the limit is (could be the sensor, could be the processors) to get to 24 or 30fps.
Now think of this, the scarlet fixed can do 150fps burst and 120fps sustained!