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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 12 Jan 2009 (Monday) 00:08
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HDR and Low EV values

 
David ­ Ransley
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Jan 12, 2009 00:08 |  #1

Look at these and the EV values: http://www.hdrsoft.com …ry/gallery.php?​id=2&gid=0 (external link)

The EV= 1 or 2, these sites provide a calculator:

http://www.dpreview.co​m/learn/?/key=exposure (external link)
http://www.giangrandi.​ch/optics/lenses/expca​lc.html (external link)

Is it a general rule to have or go for Low EV values for HDR photographs?

Thanks


DRH

  
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AJSJones
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Jan 12, 2009 01:05 |  #2

You misinterpreted what you saw in the first link. The "EV" you see in the legend is actually the EV difference between the bracketed shots used for the HDR (1/30 , then -2EV = 1/125, then -2EV =1/500) The exposures are at f/8 and ISO 100 at those speeds so these were at EV11, 13 and 15; a series differing by 2EV!


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David ­ Ransley
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Jan 12, 2009 01:24 |  #3

AJSJones wrote in post #7057389 (external link)
You misinterpreted what you saw in the first link. The "EV" you see in the legend is actually the EV difference between the bracketed shots used for the HDR (1/30 , then -2EV = 1/125, then -2EV =1/500) The exposures are at f/8 and ISO 100 at those speeds so these were at EV11, 13 and 15; a series differing by 2EV!

Thanks, on the 40D one would then set f8, ISO 100 and bracket the shots. get three at EV11, 13 and 15. And then post process. The EV difference of 1 or two indicates the bracketing (makes more sense). Will check what the 40D supports for auto bracketing.

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DRH

  
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HDR and Low EV values
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