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|| SportsShooter.com: Member Message Board
Yellow Grass???
Gabriel Hernandez, Photographer
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Harlingen | TX | USA | Posted: 3:05 AM on 09.30.06 |
->> Hello everyone. I have a HUGE question. Why is my green grass coming out YELLOW??? I set my white balance up and I still get yellow. I use a Nikon D2H with a Nikon 300 2.8. ISO is at 1600. Is this something I can fix or is it because of the lights the football stadium has??? Any help would be great. Thanks in advance, here is the photo.
http://www.sportsshooter.com/gabriher/yellowgrass/ |
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Wally Nell, Photographer
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CAIRO | EG | EGYPT | Posted: 4:13 AM on 09.30.06 |
| ->> Gabriel my guess would be that the exposure on the grass is about 2/3rds of a stop over. When you expose for the dark areas under the helmets, the already light areas will go lighter, hence the slight colour shifts. It is a guess, but it would be easy to verify. Next time you are in that stadium, shoot at your normal exposure, and then point the camera at the grass and see if there is a difference in exposure. |
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Louis Lopez, Photographer
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Mark Davis, Student/Intern, Photographer
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Barcelona | ES | Spain | Posted: 7:14 AM on 09.30.06 |
->> I think it's because the actual color of the grass under those lights isn't green, it's yellow. Sometimes it's hard to see because our minds are convinced that grass is green and the sky is blue. The next time you shoot at the stadium make a note of what the actual color of the grass is to the eye.
The photograph looks very natural to me, and whatsmore very accurate, and I wouldn't change a thing. |
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Paul Anderson, Photographer
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Münster | Germany | Germany | Posted: 8:14 AM on 09.30.06 |
->> Hello,
I would suggest going to the Nikon website and downloading the trial version of Nikon NX.
I would then go back to the field and make a few aperture priority RAW exposures with an Auto WB. I would also make a few PRE WB exposures.
I would then open the files in NX.
After you open the file, pull down on Window and select Camera Settings.
From here you can make adjustments to your RAW file.
If you save the file as a TIFF, it will apply the settings.
Paul |
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Corey Perrine, Photographer
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Hudson | NH | USA | Posted: 9:00 AM on 09.30.06 |
->> Gabriel,
You have a very valid question with unfortunately multiple answers. There are several variables for your situation.
1.) The grass was never a true green to begin with.
2.) Stadium lighting.
3.) Over exposure in the camera.
4.) Sensor not rendering true color tones.
5.) White balance not set correctly.
6.) Post production problems.
7.) A botched camera.
Unfortunately I wasn't there and don't know all the perimeters to your final image posting so I'm trying to help you out as logically as I can from experience. I'm gonna say it's obviously not 5,6 or 7. However, from my experience and guesstimate I would say it's a combination of 1, 2, and 3. I'm not familiar with Nikon's sensors especially at higher ISO's so I'm not gonna think it's number 4 either.
I too was struggling with color last night. I was shooting at the most poorly lit field in New Hampshire. In a three-frame burst the pulsating lights would go from red/orange to magenta to white. Pretty much every third frame was right on when shot at 4700K. Not that you were experiencing something as dramatic as I was but it’s possible you experienced a similar situation that was less noticeable to the eye. Some stadium lights are tricky, especially high school fields, where they pulsate different colors and could be a factor in your case.
In short, combine the lights with a not truly green field and opening up your exposure a little to compensate for lack of light, then you have got a green field my friend.
Corey |
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Corey Perrine, Photographer
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Hudson | NH | USA | Posted: 9:10 AM on 09.30.06 |
| ->> To answer your other question. To knock the yellow down hit command U/control U in photoshop, select the yellow channel and desaturate to your liking. But nothing drastic/unethical. |
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Corey Perrine, Photographer
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Hudson | NH | USA | Posted: 9:15 AM on 09.30.06 |
->> "In short, combine the lights with a not truly green field and opening up your exposure a little to compensate for lack of light, then you have got a green field my friend."
I meant YELLOW field. |
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Chuck Liddy, Photographer
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Durham | NC | USA | Posted: 9:56 AM on 09.30.06 |
| ->> gabriel, you need some extra fertilizer with a good dose of nitrogen, some pelletized lime and water it every day. in a couple of weeks your grass will be lush and green.......oh wait...sorry read the thread wrong.....gee that grass looks like most of the grass I see at night on a football field. combination of lousy lights and the over exposure you have to use to see any detail in the players...no amount of fertilizer will help that. |
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James Clark, Photographer, Assistant
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Melbourne | FL | USA | Posted: 10:25 AM on 09.30.06 |
->> Gabriel,
I have noticed this color shift in green grass. There are two major color shifts in digital cameras. Purples becoming blue and greens becoming yellow.
If you experience these effects, use your Photoshop (Image-->Adjustments-->Hue Saturation) to do a hue shift of about +6 should bring the colors back to normal (personal tastes differ). You can make the shift to all channels or to select colors, that is up to your preference.
If this corrects this, you can fix this in camera as most digital cameras have incamera hue adjustment settings of +/-9.
Oh, this yellow shift of green grass can occur under any light, daylight, halogen, etc. Once you are aware of hues your colors are going to start to pop. |
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Damon Moritz, Photographer, Photo Editor
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Woodbridge | Va. | USA | Posted: 11:26 AM on 09.30.06 |
->> YOu may also want to change the angle that you are shooting at. When you are low to the field you are receiving a different reflection of light than when you are at a standing height. It's the whole angle of incidence equals angle of reflection thing... When you are lower you may be seeing a greater specular highlight reflection off of the grass blades. This could cause a shift in apparent color.
The stadium was designed and lighted to be seen from the stands, not from 2 feet above field level. |
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Jonathan Palmer, Photographer
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Decatur | AL | United States | Posted: 1:32 PM on 09.30.06 |
->> Gabriel i have noticed the same thing and i would side with Mark that it is the stadium lights making the grass a different color. when my levels histogram in photoshop has no color shifts i feel like there is not much more i can do without altering the image too much. I guess we could use the kelvin temp white balance meter for the grass and use a gel to correct for the flash color. Sounds tricky, i will post an image from next friday's game with the results.
-jp |
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James Clark, Photographer, Assistant
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Melbourne | FL | USA | Posted: 6:59 PM on 09.30.06 |
->> Gabriel,
Also, I do fine art reproductions and must produce for the artist images with the color as perfect as possible. I have seen this grass color shift occur in photographs of paintings in turf areas. Greens will turn yellow in many light and angle settings, it happens. But don't think that it is unavoidable. I highly reccommend you check your hue settings.
You can change your shooting position in the field; but you will only be limiting yourself to what shots you can take. This effect is truly in your camera settings and you can control it. |
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Erik Markov, Photographer
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Kokomo | IN | | Posted: 6:40 AM on 10.01.06 |
->> I've been bugged by this problem the past few seasons also. I was doing the adjustment of yellow in HueSaturation but didn't always like the effect it gave me. Part of the problem I found is if with some of our schools around here, they wear yellow or green jerseys and adjusting the color of the grass thru off the jerseys then. It works ok if there arent those color jerseys in the photo but I wanted something that would work no matter what the jersey color was.
I am trying this year what Jonathan P. suggested about gelling the flash. It doesn't really help you Gabriel cause it doesn't look like you're shooting flash, but for anyone else, it is something to try. I'm still trying to figure out what color yellow gel to use, what I've tried thus far doesn't seem to be enough. Stack 20-30 sheets together it should be good, right? Kidding... I hope it doesnt take that much. |
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Gabriel Hernandez, Photographer
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Harlingen | TX | USA | Posted: 3:15 PM on 10.02.06 |
| ->> Thanks everyone .... I also experience this problem with some gyms at the some schools. My guess its the lights causing this problem. |
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Louis Lopez, Photographer
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Fontana | CA | USA | Posted: 3:20 PM on 10.02.06 |
->> This previous thread contains a lot of helpful information.
http://www.sportsshooter.com/message_display.html?tid=19072
I did post a link to the DCF software in this thread and it has solved most all color issues at time of capture. It does not affect your white balance. |
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