Цитата:от: otak1
Откуда такое?
DR Modes это не ДД в чистом виде. DR400 - это когда с недодёром снимают на исо200 и тянут на
два стопа, как бы до исо800. DR200 - тянут недодёр
на стоп. Так что соответствие исо 400 и 800, при котором работают DR Modes - условное.

И здесь тоже самое: http://www.dpreview.com/reviews/fujifilm-x-pro1/20
Dynamic Range Expansion Modes
The X-Pro1 has two dynamic range expansion settings to bolster its highlight range: DR200 (200%) adds an extra stop of information in the highlights, and DR400 (400%) adds two stops. Technically, the camera achieves this by applying less amplification to the sensor's output than usual prior to AD conversion to avoid clipping highlight data, then pulling-up the midtones to the correct brightness in JPEG processing. This is essentially the same process as Canon and Pentax use for their highlight-expansion modes.
An alternative way of thinking about this is that DR200 is like underexposing a stop to retain highlights then adjusting the brightness afterwards, and DR400 is like underexposing by two stops and adjusting further. Because of this, the minimum ISO available in each mode is limited: ISO 400 at DR200, and ISO 800 at DR400. The flipside to this approach is shown by ISO 100, which is effectively the opposite; i.e. ISO200 overexposed by a stop then pulled-down in processing. This results in the loss of stop of highlight range - to all intents and purposes it counts as DR50, and should therefore normally be avoided. (Note ISO 100 is only available in JPEG anyway).
Другое дело - базовое исо, для одной и той же 16МП матрицы образца 2010 года, ИМХО, значение 200 обеспечит больший ДД, чем исо100 - мои клеветнические измышления...