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Auto ISO Behavior

Started Jul 22, 2021 | Questions thread
Erik Baumgartner Senior Member • Posts: 6,893
Re: Auto ISO Behavior
8

Auto-ISO will raise the ISO only if your minimum shutter speed has been reached. The camera will however typically display your max ISO setting unless the exposure is locked (with a half-press).

If your camera raised the ISO, is the shutter speed at your minimum setting? If so, it did what it was supposed to do, the only other options are to lower the shutter speed below you minimum setting (which you DON’T want) or to increase the aperture setting (which, I assume you are controlling manually). If you have a small aperture set (higher number), the ISO can easily go over 1000.

Note: the camera will override your minimum SS setting if your max ISO limit is reached (I always use ISO 12800 for all three presets with different minimum shutter speed options).

DR200 and 400 will raise the minimum ISO available to 400 and 800 respectively.

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