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What does a grey card do

Take away the white target from the scene, reframe, refocus and take the shot.
This approach works better when you have your images in RAW format.

The meter will proceed to +ve or -ve but leave it and take the photograph.
After your session, open Lightroom and navigate to the gray card photo.
Use the eye-dropper tool to select a tone from the gray card.
You should now have an accurate white balance setting.

  • If you can move your subject(s), keep these things stand in a location
  • If I’m using my 8×10 card, I fill the frame with the card.
  • In most cases this is close to the reality, but not always.

That’s the inherent fallacy of the “3-tone” exposure cards.
A white object in shadow shouldn’t be reproduced as white, but some shade of light gray.
A black object in very bright light should not be reproduced as black, but as some tone of dark gray.
So rarely, should the histogram of a black, white, and gray 3-tone card (which presents a single surface facing one direction) produce spikes perfectly at each extreme side and center of a histogram.

Should You Develop A Custom White Balance In Your Camera?

Therefore, to preserve the intended look of the scene, it is very important take away the gels before taking the shot with the gray card included.
Well, perchance you get an idea on how best to use it by reading this article (although it is not a manual of some sort).
And the reason I don’t is basically because no one told me How exactly to use one.
I am told by instructors “use a gray card.” And that is the extent of my instruction.

It’s in handy using situations, especially in cases where your camera meter is limited and can’t obtain it right.
The one thing you do need to watch though is your highlights and shadows.
Your subject could be properly exposed but you may be blowing out your highlights or underexposing your shadows.
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I take advantage of it when I’m in doubt if I will get the colors right, also it only takes one picture to utilize.
Gray cards save me time when editing my images and take the guesswork out of remembering what the specific colors of an area where.
Some clients will request your images accurately reflect the real colors of the house.
This is also true for rooms which have light pastel colors, dark ceilings, or strange lighting.
I do not have a good way of describing these rooms to you, but after a few years of editing your own photographs, you will learn to identify them.

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Where this difference really involves light is on video.
When working with a scope and attempting to set your WB the cheaper generic cards will clearly show they contain colors other than black.
It has been my experience that I will not necessarily remember what the specific colors were in the home when editing the photo in Lightroom.

The ExpoDisk shot is
then used for the foundation of a custom white balance.
If you’re shooting with RAW files, you don’t have to be worried about setting a custom white balance, but if you’re shooting JPEGs, you might like to consider it.
Creating a custom white balance in your camera can be time-consuming, but it’s worthwhile for the accurate colors it could produce.
If you’re shooting with RAW image files, you don’t have to worry about setting a custom white balance.

Here is where a single photo of the area with a gray card in the frame will allow you to out.
You do not need the gray card in every shot, just one.
Use copy and paste buttons, to copy the color settings of this photo.
Or select other photos and Sync this color setting to all or any of them.
Not getting a handle on white balance will probably cost you lots of time, lots of wasted images, and probably cause plenty of disappointment.

artificial light sources such as for example incandescent and fluorescent light.
Canon Digital SLRs have various pre-programmed white balance modes (such as flash, sun, shade …),
but they are simply approximations of the specific color of the light.
4 — Take the cards away — Put the cards away, and take photos as usual.
WHEN I mentioned; if the lighting changes, it’s back again to step 1.