Auto ISO question on X-E1

Started Dec 16, 2012 | Discussions thread
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Al Valentino Senior Member • Posts: 4,920
Re: Auto ISO question on X-E1

Lawrie Silverberg wrote:

Al Valentino wrote:


DR400 requires a min of ISO 800 and DR200 requires a min of ISO 400 to work. The extended DR is to prevent blowing out highlights. The way it does this is by exposing one or two stops under to capture highlight detial, then it compensates in the midtone and shadow by increasing signal via the ISO. This is why it needs that extra stop, ISO200, or two, ISO400, to work. By setting DR to 400 you forced the camera to use the higher ISO. This feature can be extremely useful and is designed exclusively to add highlight detail, so it is not useful if there are no bright areas to extend the Range. It is to pull back highlights.

See below how I needed it to not blow out the lights or the skating rink. These are essentially straight out of the camera at DR400.

If you had set your camera on Auto DR, would it have chosen 400?

One those shots i was using high IsO anyway as they were both handheld, the skating rink shot was at ISO 5000 and shot wide open f/2.8. the other shot was a set at auto ISO but shot at about ISO 1200 so high ISO was the case either way. I think, but an not 100% positive, that auto DR would kick in if the histogram shows blown highlights.  If the histogram is normal and everything is well contained it will not kick in.

 Al Valentino's gear list:Al Valentino's gear list
Olympus E-M1 Tamron SP AF 90mm F/2.8 Di Macro Olympus M.Zuiko ED 75-300mm 1:4.8-6.7 II Olympus 12-40mm F2.8 Epson Stylus Photo R1900 +5 more
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