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<p><strong>From Magic Lantern<br />
</strong>The Magic Lantern team is letting the world know that they are at the beginning of a new function for the 5D Mark III and EOS 7D. Apparently they’ve figured out a way to boost dynamic range by 3 stops by using a new way of making a photograph by using ISO 100 for some of the vertical lines and ISO 1600 for the rest of it. Sounds wild to us, not sure how they’re doing that. There will be a process to combining the lines of 100/1600 ISO to give you the full resolution file.</p>
<p><strong>From Alex at ML</strong></p>
<li><em>Works for both photos and raw videos on Canon EOS 5D Mark III. On Canon EOS 7D, photo only (since it can’t do raw video).</em></li>
<li><em>What are the benefits? more dynamic range (less shadow noise).</em></li>
<li><em>The functionality was not really in Canon firmware, but in the chip that samples the sensor. Canon firmware does not make any use of it (they just set both ISO “registers” to the same value). It was implemented on the hardware side though (and that’s why it works only on these 2 cameras, because only they have two ISO amplifiers).</em></li>
<p><strong><a href=\"http://blog.planet5d.com/2013/07/magic-lantern-improves-canon-eos-5d-mark-iii-dynamic-range-to-14-stops-major-landmark/\" target=\"_blank\">Read more at Planet5D</a> | <a href=\"http://www.magiclantern.fm/\" target=\"_blank\">Visit Magic Lantern</a></strong></p>
<p><strong><span style=\"color: #ff0000;\">c</span>r</strong></p>
What nobody seems to comment upon is what this could imply for future products from Canon.
First, even in existing 8 channel bodies (7D, 5DIII), Canon already implemented the possibility to have two different exposures in separate columns.
Now, we know that Canon just released a new sensor in the 70D, with two photosites under each pixel. And
for the Phase-detect on Sensor, they can read each one separately.
So, everything seems to be in place that for a new 7D II Canon could implement this technology to increase the dynamic range of their camera, i.e. expose one half site with one ISO, and the other with a higher ISO - then combine the information. Because all this happens under one microlens, all the subsequent algorithms (demosaicism etc.) work just as before, and don't need to be implement de novo as for this Magic lantern solution.
Ergo, it should be possible to get something like a 14 stop DN camera from Canon. I hope they get their algorithms done to implement this, the hardware seems to have the potential to do it.
As pointed out, these ideas are not new, having been around for more than a decade, see page 15 ff.http://www-isl.stanford.edu/~abbas/group/papers_and_pub/chiao_thesis.pdf