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

Started Sep 2, 2013 | Discussions thread
Trevor G
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Re: The Advantages of DR400 vs DR200 vs DR100 - High Contrast Scene
In reply to Elyharbour, Sep 9, 2013

Elyharbour wrote:

I've just seen the same results in Silkypix. But back to LR4.4. Here are exported JPEGs from two RAW files - one at DR100 and one at DR400. Ihe original OOC RAWs looked more or less the same. The window was completely white with virtually no detail. In both cases I then pulled back exposure by -2EV and the highlights slider to -100%. You will see that detail then appeared in the DR400 window, but not the DR100 one. At DR200, the result was in between, but closer to DR400.

So it would seems DR200/DR400 is writing highlight protection to the RAW files, but you have to pull it out.

Yes, that's correct.

DR200 under-exposes by one stop and DR400 under-expose by 2 stops.

In-camera the under-exposure is pulled back up and:

1) In the case of the in-camera JPEG the highlights above 0EV are pulled back under 0EV.  This involves compressing those details into a smaller space, which means that the image, above the midtones, is not as accuratelyecorded as below, or as it would be without those extra highlights.

Nonetheless, that compression of highlights is still better than if they are clipped away.

2) The over-exposure is left in the RAW data and is subsequently "recovered" /retrieved simply by pulling the overall exposure back in PP.

When you first open a RAW image with over-exposed but retained highlights, such as a DR200 or DR400 one, it will look bright and over-exposed until you reduce the exposure slider.

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

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