Dynamic Range Really isn't as important as you are lead to believe.

Started 5 months ago | Discussions thread
clengman
Senior MemberPosts: 1,198
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Re: Dynamic Range Really isn't as important as you are lead to believe.
In reply to mpgxsvcd, 5 months ago

mpgxsvcd wrote:

Dheorl wrote:


Landscapes with no subject motion... I wish (see previous post). Maybe living by the coast has swayed my view of this. It's very wavey and windy at the moment (the size of the swell we have been getting have moved half the beach onto the road infront of my house, and resulted in what is thought to be the largest wave ever surfed).

Also forests have a horrible habbit of moving in the breeze, especially the smaller branches where there is the most issue with them dissapearing into a blown sky.

The only one where I think and HDR image would be truely pratical is in a church... unfortunately most don't allow tripods. Yes you can do it handheld, and with modern programs you normally can't tell because they correct for camera movement, but I doubt they will ever be as perfectly sharp around the edges of the different layers as a single images would be.

You gave a good explanation as to why HDR won't work in that situation. Now can you give a good reason for how less than a stop extra Dynamic range is going to correct for a scene that contains more than a stop extra dynamic range?

If you can get the scene with a single exposure then yes HDR is probably not necessary. However, my guess is that it wouldn't matter which camera you used in that situation because the differences in sensor dynamic range within the same class of camera really is not that much different.

Sure. If you are comparing a JPG image from a compact sensor camera to a Full frame there is going to be a huge difference in dynamic range. However, if you are comparing like camera models then the difference really isn't that great.

Look at this DXOmark comparison between the EP1, GH2, and EM5. Each one adds about 1 stop of DR. That really isn't a lot and it would be extremely rare when the GH2 would clip but the EM5 wouldn't.

I am not saying that extra DR is a bad thing. However, it is rarely a truly useful thing that completely resolves the issue that the scene has too much dynamic range. It may eleminate clipping in a portion of the scene. However, it is very rare that the difference completely eliminates all clipping.

http://www.dxomark.com/index.php/Cameras/Compare-Camera-Sensors/Compare-cameras-side-by-side/%28appareil1%29/793|0/%28brand%29/Olympus/%28appareil2%29/677|0/%28brand2%29/Panasonic/%28appareil3%29/612|0/%28brand3%29/Olympus

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GH3, Hacked GH2, and Full Spectrum GF1 Sample movies
http://www.youtube.com/user/mpgxsvcd#play/uploads
GH3 Tips and Tricks
http://www.youtube.com/watch?v=hIMdxoGbNXU
GH2 Setup Walk through
http://www.youtube.com/watch?v=uROQbbiiO2I
http://vimeo.com/user442745
GH3, GH2, GF1 Pictures
http://www.dpreview.com/galleries/4222674355/albums

This really seems like a dumb argument all the way around. You say that there's no benefit to an increase of 0.5 a stop... maybe, but then you point out that between subsequent m43 generations there has a been a gain of about a full stop. So that's one thing. If I upgrade from my e-pl1 to an e-m5, I will get a significant boost in useable DR.

You say that in very high contrast scenes (like dark church bright windows, or high contrast landscape) you may have 20 stops to account for. Fine. I think it's a fallacy to say that if you can't capture the entire range in one photo, that an extra 2 stops is worthless. If the range in the scene is greater than the DR of the sensor then it's true you either clip some highlights, or you lose some shadow detail, but if you have 2 more stops to work with it makes the compromise less painful. No matter how you look at it, a higher DR sensor gives you more information to work with than a lower DR sensor.

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