Exposure basics, lesson two point one (& ISO)

Started Mar 19, 2013 | Discussions thread
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richarddd
richarddd Senior Member • Posts: 2,982
Re: Motivation for ETTR

In fact the original motivation for ETTR (giving more raw levels) was completely bogus.

The motivation for ETTR has always been to use the entire range of the sensor to record the image. No more and no less. Which is why the "optimal" exposure if you are shooting Raw (ETTR) is different from the "optimal" exposure if you are shooting JPEG (expose to minimize PP adjustments).

Take a look at the seminal article on ETTR:  http://www.luminous-landscape.com/tutorials/expose-right.shtml  He sure seems to spend a lot of time talking about available levels

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