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Thread started 25 Aug 2009 (Tuesday) 16:55
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Advice needed please.

 
ddthtlc
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Aug 25, 2009 16:55 |  #1

Advice needed please.

When I take photos of my border collie and review the histogram, in the majority of photos I have taken I get blinking histograms on the white areas of my dog mainly the collar and head stripe.

Should I aim to totally eliminate the blinking using the minus exposure compensation? I have noticed when I do this I can totally eliminate the blinking areas but the overall photo is too underexposed.

Am I on the right track.




  
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prinspaul
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Aug 25, 2009 16:59 |  #2

no...the blinking areas are not a problem...as long as you like the picture, overall the picture should be exposed properly and it always happens some part will be over or underexposed. That creates a nice contrast anyway!

Good luck!




  
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ddthtlc
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Aug 25, 2009 17:04 as a reply to  @ prinspaul's post |  #3

Thanks prinspaul

Some of the photos looked fine to me but clearly some were overexposed It was just the way the histogram presented blinking like that I took as a warning sign something was drastically wrong and deleted all of them.

I feel a whole lot better now knowing I am at least on the right track.




  
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prinspaul
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Aug 25, 2009 17:08 |  #4

just keep on playing with different settings, for example:

if the picture you take is
f/4 1/100 ISO 400

then try for example:
f/4 1/80 or 1/125 ISO 400
f/4 1/100 ISO 320 or ISO 500

or something complete different! you are the judge..if you like the picture (even with blinking areas) than it should be good!




  
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Brett
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Aug 25, 2009 17:15 |  #5

The histogram can mis-represent blown highlights at times, but they're not something you want to see consistently.

Are you shooting raw or jpeg? What Picture Style are you shooting? It's been said on this forum that the most accurate histogram is provided by Neutral Picture Style. You might try that and not have "blinkies" at all.

I assume you're shooting with 0 exposure compensation, and in either Tv or Av, correct?



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ddthtlc
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Aug 25, 2009 17:22 as a reply to  @ Brett's post |  #6

Hi Brett

This is all new to me and checking the camera I have been using AV /Jpeg standard mode.

I have managed to work out that if i use - exp comensation I can eliminate some of the blinking but the picture is then turning out too dark.




  
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Brett
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Aug 25, 2009 21:58 |  #7

But, as I said, the histogram can mis-represent blown highlights.

Are you seeing loss of detail in the whites once you open them on the computer?

Try switching your Picture Style to Neutral, and see if you still see the "blinkies".



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ddthtlc
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Aug 26, 2009 08:34 as a reply to  @ Brett's post |  #8

Brett

Thanks for advice I will try the different picture style. No I did not notice any loss of detail.




  
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Replaces
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Aug 26, 2009 09:19 |  #9

white objects are highlighted often times
don't think about it as long as you like the picture/overall exposure.




  
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joedlh
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Aug 26, 2009 09:21 |  #10

If you shoot in raw mode, you have more to work with and may be able to recover some detail in the blown out areas.

Digital sensors do not have the dynamic range to accommodate blacks and whites in the same image. Something has to give at either end.


Joe
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Editing ok

  
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