Questions tagged [gray-card]
a gray cards is used to determine the correct exposure or white balance before or during shooting
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How bright should a 18% gray card be in my image when exposed correctly?
Let's say I have a 18% gray card in my scene and I want to set the exposure manually.
When I take a picture of the gray card what should the RGB values be when exposed correctly?
What is important is ...
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Calibrate exposure in RawTherapee using a grey scale
I just got a grey card which comes with a 11 levels grey scale :
L 18.9 | Ev −2 | Ev −1.5 | Ev −1 | Ev −0.5 | L 50 Ev 0 | Ev +0.5 | Ev +1 | Ev +1.5 | Ev +2 | L 98.2
...
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Gray values on QP card 201
I have a colour standard card QP 201 which I am hoping to use to calibrate gray values in some scientific photos. For this purpose I will need to know the percentage gray values of the gray squares (e....
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How do I use a gray card for shooting a cityscape? [duplicate]
I am shooting wide shots of storefronts. I am standing across a street and using a zoom. I am confused about how to use the QP 101 gray card.
How big does the gray card have to be in the frame?
Do I ...
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why exposing with 18% gray card does not give IRE near 40?
I am trying to understand how to get perfect exposure using gray card.
With my Sony a6500 using ITU709 gamma, I locked exposure by doing spot metering on the gray card.
When importing in final cut pro ...
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Unclear whether grey card can be used for exposure in post production?
I only use a grey card a little, but need to use it more to get more consistent product photo's. I understand how to use it to adjust white balance in camera, in Photoshop and Camera Raw, however I'm ...
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18% gray paint manufacturers
I want this to kind of be a "mega thread" of paint.
So, here is the scenario: I have a room that I want to use as a studio. Since this room will only be used for photography, I want to have it ...
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Why does using a white-balance card make my images way too warm?
I recently bought a white-balance card kit, as I didn't get consistency in my images. However, when I use the grey card in the set, my colours are always way too warm. I mean a lot. 8000K instead of ...
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Why do gray cards come with a black card and a white card?
Whenever I adjust my white balance during post processing I try to select a sample of 18% gray somewhere in my picture. In the real world, that color doesn't always exist in every frame that I ...
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What are the differences between color calibration cards?
The lower level ColorChecker Classic is around $59 USD, Datacolor Spyder comparable one is also around $50... meanwhile there's some DKG Tools for only $25.
Current on B&H:
DKG Color
Spyder 24
X-...
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How to create custom white balance on Nikon D800 with a small gray card?
I'm using a 3x5 grey card to set a custom white balance for a Nikon D800 camera, however, for my 50mm lens, the card does not completely fill the camera's image frame. It appears this is throwing off ...
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Is a gray card sufficient to get accurate colors in a photograph?
I have a card that has three bands: black, gray, and white. If I place this in a photograph I am taking that I want to be color accurate, will that give me sufficient information to tune the photo, ...
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Do grey cards work with film cameras?
I know grey cards work with digital, but not sure if they work with film, if they do work, will buy, else I don't see the need to buying one. Reason is that I think that all that film cameras do is ...
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How do you use a gray card...in the dark room?
Similar to this question; however, I'd like to know more information about using a gray card in a dark room.
I know that I am supposed to balance off of it; however, after I make a test strip, how do ...
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Why is 18% grey considered to be in the middle for photography?
I heard someone (a photographer) say recently that 18% grey is half way between black and white, not 50%. This seemed a bit illogical to me, and when I asked her why, she said she didn't know. After ...
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Why isn't my grey card giving me repeatable results in the same room with different lighting?
Here are two white-balance adjusted photos taken in two different lighting situations. Both photos were shot RAW and corrected using the white balance tool in Lightoom (using a large enough sample ...
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How do I measure the correlated color temperature of a light source with a DSLR without a gray card?
By curiosity, I tried to measure the correlated color temperature of different light sources in my house by taking a photo of a white object (a piece of paper) lit by a single source at a time. The ...
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Why do I get different white balance results from a grey card vs a white card?
I recently purchased a grey card set from here (comes with a grey card, white card, and a black card):
http://www.amazon.com/DGK-Color-Tools-Reference-Correction/dp/B001KNP3MQ/ref=sr_1_1?ie=UTF8&...
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Is a 18% gray card intended for exposure metering, and its use to set white-balance is just a bonus? [duplicate]
I've heard that 18% gray cards are intended specifically to aid on determining the right exposure for photography, and only coincidentally for white balance. Is this true? Is it better to use a ...
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How to use a Kodak Gray Scale to color-proof image scans?
I am familiar with the usage of a (Kodak) Gray Scale card when photographing, e.g. to get a color-proof replica of a painting. Now, I'd like to use such a card to ensure my scans are color-proof. At ...
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Can a grey card be used in place of a flash meter?
I've been trying to improve my flash/studio skills. Googling around, I see that some tutorials use a flash meter to set ratios, two stops for white background...
I'd rather not buy another piece of ...
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How does one use a white balance card (gray card) to set a custom white balance? [duplicate]
I have only been able to find instructions that involve post-processing. Is there a process where I can take a photo of the card and set that white balance and save it for my photos? Basically setting ...
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Using gray/white card to determine white balance, does it matter where I stand when I take reading photo?
If I want to use a white card to determine the white balance, and I'm taking a picture of something that is a short distance away from me, does it matter if I don't walk back to where I'm going to ...
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How can I adjust for any inaccuracy in a homemade white card?
Quite a number of years ago, I made my own white card. It is basically made up by two white access cards in plastic glued together and sanded down so that they have a matte finish.
The cards have ...
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Can I cut up a 15x20cm Novoflex Graycard without ruining its properties?
I purchased a graycard, specifically a Novoflex 15x20cm (~ 6x8") card that is white on one side and 18%? gray on the other side.
However, it's a bit too large to comfortably fit into jacket pocket or ...
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How can several gray card shots help with metamerism?
In a comment to my answer on gray card angles, @underarock mentioned having used several gray card shots at different angles to cope better with metamerism.
This sounds intriguing, but I'm still not ...
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Gray card angle during custom white balance calibration - does it matter?
Do I have to have the gray card on a specific angle while taking a photo for custom white balance calibration? Or it is irrelevant?
I am guessing that the gray card plane should be perpendicular (90 ...
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Should I reuse a custom white balance for the same scene but with a different lens?
Let's say I'm shooting from a tripod to an exact spot, I set a custom white balance with a gray card and then I switch lens.
Should I redo the custom white balance?
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How do I adjust white balance when the color of the gray card in my photo appears uneven?
I need some advice regarding white balance adjustment.
I was using a gray card when shooting a series of photos in a forest, because I found the light a bit tricky there. The plan was to set the ...
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How can I ensure my gray card is color-accurate?
I recently bought a gray card set (Zeikos ZE-DGC Digital Grey Card Set with Lanyard from Amazon) and although customers had no complaints about it, I belatedly became worried because the manufacturer'...
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Should I be warming grey card calibrated shots?
In a recent blog post at this site, Tim Grey recommended the following:
You could then use the white balance tool in Lightroom or Adobe Camera
Raw (or similar tools in other software) to make the ...
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Why are greycards used for white balance?
I know 18% grey cards are supposed to provide a neutral color to set custom white balance.
But why are grey cards used instead of pure white ones?
My assumptions:
Is a specific greytone easier to ...
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How do I get a meter reading for a DSLR without a gray card?
I read an article called Expose (to the) Right, which explained why you should try to get the graph of the histogram as much to the right of the scale as possible. The reasoning is that DSLRs record ...
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What's a good ad-hoc replacement for a gray card?
I know that a real gray card is the best thing to use to determine exposure. But I'd like to know if there are other naturally available features that can be used in a quick and dirty way. Are fields ...
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How do you use a gray card?
There are already two questions on how to make a gray card, but unfortunately my ignorance goes deeper than that.
How do you use a gray card?
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How can color temperature be measured using a digital camera?
I know that one can photograph a color-neutral card (white, gray, black) and use it for white balance, either in-camera or in post-processing.
Using an image of a color-neutral card taken under given ...
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What is the 18% gray tone, and how do I make a 18% gray card in Photoshop?
I have heard about 18% gray tone — what is it really, and why 18% (and not 20% or some other value), and how can I make it in Photoshop?
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How could one make a DIY Gray card for exposure/color correction?
I know that there are "gray cards" sold that help with exposure/color correction, but as I'm on a tight budget I'd like to make my own. Is this possible?
Also, are there other objects (paint sample ...
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