Imagine you could improve the dynamic range of your Canon EOS 5D Mark III or Canon EOS 7D to 14 stops! The Magic Lantern team is working on 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.
From Alex at ML
- 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).
- What are the benefits? more dynamic range (less shadow noise).
- 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).