The Advantages of DR400 vs DR200 vs DR100 - High Contrast Scene

Started 10 months ago | Discussions thread
Trevor G
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Re: The Advantages of DR400 vs DR200 vs DR100 - High Contrast Scene
In reply to Elyharbour, 10 months ago

Elyharbour wrote:

Thanks Trevor. I don't want to take too much more of your work time!!

I can bill you. 

My problem is (well I probably have many) that having no experience of Fuji cameras until the past week, I don't understand the fundamental principles of Fuji DR100/200/400. I know what's it's trying to achieve, but how is it doing it? Please feel free to point me to where this is all explained if you can.

It's a bit of a party trick on non-EXR cameras, such as the X20 and the large, X-Series cameras.

At DR400 mode the camera under-exposes by 2EV and then brings up the image in JPEGs in-camera by ISO amplification techniques.  These lift the low to midrange tones, while the mid to highlights are adjusted down via a tone curve arrangement so that the extra 2EV of highlights are squeezed back down under 0EV.

I don't think I have shown what happens with JPEGs yet, but I will.

In RAW, it's as if you have 2EV or more of unclipped highlights to bring back down in a linear fashion (unlike the non-linear conmpression which occurs with the JPEGs).

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Cheers
Trevor G
Silkypix tutorials at: http://photo.computerwyse.com

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