Canon doesn't really care anymore...

Started 5 months ago | Discussions thread
altair8800
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Re: Canon doesn't really care anymore...
In reply to bobn2, 5 months ago

bobn2 wrote:

altair8800 wrote:

bobn2 wrote:

altair8800 wrote:

Here is part of what I said in that link:

"For each frame, all of the photodiodes must be sampled and each pair combined for the final output. That is 40M x 7 fps = 280 megasamples per second available to the processor. Near double the rate for 7D."

Yes, but that isn't true, the camera doesn't have to sample the whole sensor for AF, it just does windowed readout, reading out the AF points only. Then for the main capture, the two sub-pixels are binned on the chip. There is only one readout transistor per full pixel.

I have not found any reference for that. Do you have a link?

Somewhere. Believe it or not as you wish. It's more likely that Canon is sharing a readout transistor, as they do on most of their sensors than they have magically multiplied the speed of the DIGIC.

If it works as you say, I would think the magic DIGIC could handle it alone. However, they developed a pre-processor to take some load off the DIGIC. If you find that reference, please pass it on.

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