Archived posting to the Leica Users Group, 2017/02/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The Kodak card is supposed to be neutral and usable for white balance. The info sheet that comes with it states that, and shows a spectral response graph showing that as well. I?ve done numerous tests with it and it gives consistent results in all types of light, though the results are (as I state in my tutorial) very slightly warmer than the results obtained with the other cards. I think the Xrite Colorchecker Passport?s white balance squares are the very best. The differences between the Colorchecker Passport, Whibal, and Kodak Cards are subtle though. Each of the cards I tried gives slightly different results. On the Colorchecker Passport, Xrite says that you should not use ANY of the white or gray squares on the passport?s page that had the old Macbeth Colorchecker chart, as these are not truly neutral. Instead, they say to use one of the two white balance pages. One is a large light gray page. The other is on the page opposite the traditional Colorchecker. That page has two lines of white balance squares. One is labeled Portrait, the other Landscape. Each line includes a true neutral square and the several slightly non-neutral squares that allow you to choose a slightly warmer white balance (on the portrait line) or a slightly warmer or cooler white balance (on the landscape line). -- Chris Crawford Fine Art Photography Fort Wayne, Indiana 260-437-8990 http://www.chriscrawfordphoto.com My portfolio http://www.facebook.com/pages/Christopher-Crawford/48229272798 Become a fan on Facebook On 2/3/17, 1:24 PM, "LUG on behalf of Eddy Willems" <lug-bounces+chris=chriscrawfordphoto.com at leica-users.org on behalf of eddy at altphoto.be> wrote: >there is something wrong on page 2 of your manual > >The Kodak Gray card is made to give you 18% gray >it is I think the only card on the market today that gives you the >perfect 18% gray >it is a card the measure the light >because all light-meters used to be calibrated on this 18 % gray >but the kodak gray card doesn't reflect all the colors in the same amount >that's why they made digital gray cards >these are not meant to meter the exposure >the name is wrong we better cal these white balance cards >it is always better to use one that's not grey >the WhiBal G7 in your collection is the best > >when you use the ccp they advise you to use the the second path on the >white side of the bw strip > >I teach photography and every year when I explain the difference between >exposure metering and white balancing >I ask the students to put their gray cards on the table >then you see a big difference between them, you even see big differences >between cards from the same manufacturer. > >white balance metering is also different as exposure metering, you have >to hold the card different > >and color temperature metering without camera calibration is only half >the story > >best regards > > > >Op 2/02/17 om 23:09 schreef Christopher Crawford: >> I have just added a new tutorial to my Photo Lessons website! >> >> White Balance Demystified >> <http://crawfordphotoschool.com/digital/whitebalance/index.php> >> > > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information