Started Dec 20, 2013 | Questions thread
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s_grins Forum Pro • Posts: 10,768
Re: Why ETTR?

Ysbrand Galama wrote:

Can someone explain to me why I should expose to the right (ETTR) in low light conditions.

Let's take an example to explain what I do not understand. Let's say my camera measures F2.0, 1/50th and ISO 800 (no over- or under exposure). I want to ETTR so I set my camera to F2.0, 1/50th and ISO 1600.

Why would ISO 1600 give better results than ISO 800? I maybe exposing to the right, but also the sensor noise increases, negating the effect.

I must be missing something.


Why not to set camera to F 2.0  1/30  ISO 800?

BTW, I do not ETTR, or ETTL, except of just a few cases.

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