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"Canon unveiled its highly-anticipated EOS 5D Mark III just 10 days ago, but we already have a pre-production sample in-hand, and will be putting it through its paces over the next week. Today's installment focuses on high-sensitivity still image shooting, which we conducted at Gyeongbokgung Palace in Seoul, South Korea. We chose a dimly lit temple as our test subject, shooting a handful of images at ISO settings ranging from 800 to the camera's top native sensitivity of 25,600, and extended modes of ISO 51,200 and ISO 102,400. All images were captured at f/8 with a 24-105mm L lens.As expected, the camera offered excellent performance at all of the native settings -- as you can see from the image above, there's some noise noticeable when viewing an image at full size, though considering the camera's top resolution of 22.3 megapixels, we hardly see ISO 25,600 being an issue. Jumping beyond the top native range did yield significant noise, but assuming you're shooting for the web, even these settings are usable. Chances are, you won't often be examining images at a 1:1 pixel view, so jump past the break to see how each of the four frames represented above will look when scaled to a web-friendly 600-pixels-wide resolution, then hit up our source link to grab full-res JPEGs of each image captured during the shoot.ISO 800 -- f/8 -- 1/12 sec. exposure   ISO 25,600 -- f/8 -- 1/400 sec. exposure   ISO 51,200 -- f/8 -- 1/800 sec. exposure   ISO 102,400 -- f/8 -- 1/1600 sec. exposure"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2012/03/12/canon-eos-5d-mark-iii-high-iso-sample-images/>