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Olympus E-PM2 Actual ISO vs IS0 set in camera?

Started Aug 17, 2014 | Discussions thread
Anders W
Anders W Forum Pro • Posts: 22,144
Re: Olympus E-PM2 Actual ISO vs IS0 set in camera?

Leo wrote:

Thank you to all for helping. The other benefit: after reading all replies I have check my recently taken photo and YES I am underexposing most of them. I am ETTR using the displayed histogram, however the histogram is related to JPG. The histograms for the most of my photos are approximately from -0.5EV to -1EV below 255. I have found several images that before correction were overexposed and that there are enough room to adjust them down -1EV to -1.5EV without loosing the highlits. No wonder that some of my images are noisy in the low light areas . However, intentionally overexposing may cause overexposure beyond the dynamic range reserve. How you manage this problem?

Yes, the live-view as well as post-capture histogram is based on the OOC jpeg. However, the clipping point in the OOC jpeg is as a rule very close to the clipping point in the RAW file so that shouldn't make much of a difference. To avoid exposing beyond the clipping point of the RAW file, just use the histogram or, on the E-PM2, the live-view blinkies (highlight warnings) which have the advantage over the histogram of showing not only that, but also where, the highligts are clipping.

 Anders W's gear list:Anders W's gear list
Panasonic Lumix DMC-G1 Olympus PEN-F Olympus E-M1 II Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS Panasonic Lumix G Vario 7-14mm F4 ASPH +20 more
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