![]() There’s also the broader question of whether you want to use Magic Lantern’s firmware hack* at all. My 5D3 is still alive after roughly one week of playing with this, but that’s not a guarantee.” So, use it at your own risk. Therefore, it’s safe to assume it can fry the sensor or do other nasty things. In the original Magic Lantern forum post announcing Dual ISO, there’s also a paragraph in red text with the title, “Warning.” It says: “In the technical doc you can see how this method messes with the feedback loop for optical black, for example. It decreases resolution in highlights and shadows, increases moiré problems and you can’t zoom in to check focus in Live View. ![]() Of course, there are some downsides to Magic Lantern’s Dual ISO hack. ![]() You can very clearly see the difference between the two sides of the image – especially where both parts meet on the Batman figure. The top right was taken using Dual ISO at ISO 1. In Magic Lantern’s sample (above – photo credit: Luke Neumann / Magic Lantern), the bottom left of the image was taken at ISO 100. This works for both video and stills with the EOS 5D Mark II, and for still photos with the EOS 7D. The resulting capture combines both for photos and videos with increased highlight and shadow detail. So how does Magic Lantern accomplish this impressive increase in dynamic range? Magic Lantern figured out how to make the cameras alternate ISO so one line is scanned at a low ISO and the next at a higher ISO. The new Dual ISO feature increases the dynamic range of the 7D and 5D Mk III to about 14 stops – significantly better than what you can get out of the stock cameras. It runs alongside the camera’s firmware and adds new software features like focus peaking, HDR video, intervalometer, and most recently, RAW video. For those of you who haven’t heard of Magic Lantern, it’s a, “software enhancement,” for Canon DSLRs that you install via your memory card. Magic Lantern has just announced the ability to add three stops of dynamic range to the Canon EOS 7D and EOS 5D Mark III digital SLRs.
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