Thread: Auto ISO
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Old 15th September 2009
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Re: Auto ISO

DPreview have tests that measure the DR at various ISO settings. What becomes very clear is ISO 200 has more DR than ISO 100. Given that it isn't a whole stop worse at ISO 100 (E-30 is about 1.1 EV worse, E-3 is about 0.1 EV worse in the highlight range), that would indicate that ISO 100 is not simply ISO 200 over-exposed and clipped back... What it does say is perhaps with the E-30, the base sensor sensitivity may be a little over ISO 200 and for the E-3, it's a little over ISO 100. On the E-3, you can configure your lowest setting to be ISO 100.

Andy

Edit: Just looked at their test of the E-P1 - that would indicate the base sensitivity is a bit below ISO 200 - which is welcome as there isn't much point for having the lower ISOs otherwise!
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