• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: 18% grey
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 18% grey


  • Subject: Re: 18% grey
  • From: "eugene appert" <email@hidden>
  • Date: Mon, 11 Apr 2005 12:00:29 -0400

 Try setting your camera for a 2/3 stop underexposure. If that is not enough, then try a 1 stop underexposure.

 

 Actually I am shooting manually and ignoring the in-camera meter, but I did notice that, for the most part, the in-camera meter was pretty much in-line with my hand held meter. The correct exposure (independent of any light meter reading) produced a perfect Q14 greyscale from L*100, (absolute white patch) to L*9 (maximum black) with the 8 patch (18% grey) at L*70. The same exposure produces L*70 from a full frame Kodak grey card.

 

In fact when I set the camera to automatic and shoot white, grey and black cards they all translate roughly to L*70.  I would immediately suspect that my camera was simply overexposing if it weren’t for the fact that this overexposure produces a perfect Q14 grey scale.  But this could be a coincidence.

 

On the other hand it sounds like you are telling me the 18% grey card is no longer pertinent since it is no longer the centre point of the new “move to the right” exposure strategy, especially when the camera range exceeds the target.  If my results are universal, (and they probably arent,  which is why I am going out to get a bunch of more cameras to test),  I am wondering if there isn’t a digital grey card that can be used reliably for digital capture to produce this perfect exposure in the field. Of course the field will provide a dynamic range that will exceed the camera, but similar tests that I have performed outside seem to indicate that the best exposure produces a grey card at somewhere between L*64 and L*70.  The only problem seems to be expecting L*54.  Maybe it would be simpler to start targeting L*70 from an 18% grey card to obtain the right exposure? . 

 

OR perhaps the in-camera histogram with clipping preview has made both the light meter and the grey card redundant? 

 

 

 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden

  • Follow-Ups:
    • Re: 18% grey
      • From: Robin Myers <email@hidden>
References: 
 >Re: 18% grey (From: "eugene appert" <email@hidden>)
 >Re: 18% grey (From: Robin Myers <email@hidden>)

  • Prev by Date: Re: Eizo CG 21 and Eye-One
  • Next by Date: Is anyone using the EFI Color Profiler? Or iQueue?
  • Previous by thread: Re: 18% grey
  • Next by thread: Re: 18% grey
  • Index(es):
    • Date
    • Thread