HDR moving objects...?

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Alex1984

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Alex
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i am a newbie so excuse me if this question is really stupid but...i often see pictures of moving motorsport in HDR and often wonder how they do it as i am under the impression that an HDR photo is constructed from 3 photos (1 under, 1 normal, 1 over) and then these are layered together so how can 3 photos be taken of something at exactly the same time allowing it to be layered...?

Many Thanks
 
using the RAW file (if you shoot raw), you can make the files with as much different exposures as you wish from the original RAW.

I guess you could do the same with a Jpeg, but with less favourable results.


Al
 
They will have no doubt been done from one frame, either directly imported into something like Photomatix which will create an pseudo HDR from one raw automatically, or they have taken 3 exposures from one RAW and imported those.

This might help further - http://www.vanilladays.com/hdr-guide/#onevsthree :)
 
Alex1984 said:
i am a newbie so excuse me if this question is really stupid but...i often see pictures of moving motorsport in HDR and often wonder how they do it as i am under the impression that an HDR photo is constructed from 3 photos (1 under, 1 normal, 1 over) and then these are layered together so how can 3 photos be taken of something at exactly the same time allowing it to be layered...?

Many Thanks
Click to expand...

That's the ideal way as you get the full benefit of the increased DR, but as others have mentioned, it can be done with just one RAW file.
 
Rather than an HDR, which really needs three images, using a single RAW can provide an EDR image (extended Dynamic Range). Similar effect but using more images should provide better end results. Obviously with motion you can't really use three seperate exposures though.
 
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