16 hours ago
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Re: DXOMark results for GH3
In reply to amtberg,
3 months ago
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amtberg wrote:
Anders W wrote:
Rick Baumhauer wrote:
Pete Berry wrote:
SHood wrote:
No big surprise with the same score as the E-M5. Only difference is the measured ISO on the GH3 is closer to actual ISO vs the E-M5. Also ISO125 seems to be base ISO as all results improve at this ISO.
http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/Panasonic-Lumix-DMC-GH3
My use of ISO 125 confirms this, but with the caveat that JPG's show much more easily easily blown highlights. This should be fixable in firmware. RAW's, though, are comparable to ISO 200 as far as highlight recovery goes, and seem to have equivalent shadow depth.
Pete
Then I have to wonder if 125 is really the base ISO, or more akin to ISO50 on the 5D Mark II, where it produces cleaner files but at the cost of highlight headroom.
Hi Rick,
This has already been tested in prior threads and DxO confirms those findings: ISO 125 is a real ISO, more specifically the native (base) ISO of the camera, not a "fake" ISO like the ISO 50 on the 5DII. Why Panasonic labels it "extended" is anyone's guess.
Even stranger, ISO 125 isn't even available for shooting video, where it would often come in handy.
Interesting. Didn't know that. As you say, it would be useful for video to keep shutter speed in the proper range. Unless it's not just an oversight to be fixed in the next FW release, the only reason for not allowing it that I come to think of is that it might take longer to read big charges (at least if you want to minimize read noise) and that this might pose a problem for video.
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