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Thread started 20 May 2015 (Wednesday) 20:57
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Bike with LED's question

 
Jensgt
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May 20, 2015 20:57 |  #1

A friend of mine called me tonight asking about taking pictures of his M109...this is a camera phone pic...


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Problem is when he tries using his SLR to take a picture of the bike, the lights look white. They were in auto mode with flash off so I tried to guide them through some settings but it was not helping much. I suspect a possible white balance issue but they don't know how to change white balance so I said I could come up and try to help them figure it out next week. Any tips on how to get the color right? Exposure compensation?

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PhotosGuy
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May 21, 2015 08:09 |  #2

What was the light source for that image? Mercury vapor lights in a parking lot? The histogram shows strong green with very little red or blue components.

Edit: I just looked at the title again, so the problem is most likely the LEDs. You can't WB accurately if the light doesn't contain all the proper components of "White" light in the proper quantity.


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Jensgt
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May 21, 2015 21:10 |  #3

So how would you go about it...just get the pic and try and fix it in lightroom?


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PhotosGuy
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May 21, 2015 21:20 |  #4

Jensgt wrote in post #17566125 (external link)
So how would you go about it...just get the pic and try and fix it in lightroom?

Maybe convert it to B&W? Actually, what he has there says "re-shoot" to me.


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Have you thought about making your own book? // Need an exposure crutch?
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May 21, 2015 22:04 |  #5

That's a camera phone picture....to show the color. I'm asking because I'm going up there Monday to shoot it for him...


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PhotosGuy
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May 21, 2015 22:16 |  #6

Jensgt wrote in post #17566211 (external link)
That's a camera phone picture....to show the color. I'm asking because I'm going up there Monday to shoot it for him...

Yes, you said that. If you want images that aren't green, you have to get away from those LEDs, because that's the only significant color in the histogram. WB won't fix it
Best case, go outside in the evening with the bright sky behind you & re-shoot it: 1985 Harley Sportster with a '75 Goldwing front end.


FrankC - 20D, RAW, Manual everything...
Classic Carz, Racing, Air Show, Flowers.
Find the light... A few Car Lighting Tips, and MOVE YOUR FEET!
Have you thought about making your own book? // Need an exposure crutch?
New Image Size Limits: Image must not exceed 1600 pixels on any side.

  
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Jensgt
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May 21, 2015 22:30 |  #7

I want the LED's to be green...but not take over the whole pic. I am going to try doing it around golden hour and then try as it gets a little darker as well.


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PhotosGuy
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May 21, 2015 22:54 |  #8

OK, I thought you were using LEDs off the bike to light it, too.


FrankC - 20D, RAW, Manual everything...
Classic Carz, Racing, Air Show, Flowers.
Find the light... A few Car Lighting Tips, and MOVE YOUR FEET!
Have you thought about making your own book? // Need an exposure crutch?
New Image Size Limits: Image must not exceed 1600 pixels on any side.

  
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Nogo
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May 21, 2015 23:19 |  #9

You are just going to have to balance the LED's with another light source. Best way to do that is by trial and error. If you do the shoot at your house or office this would be a good time to shoot tethered. White balance for the light source that is not the LED's and if you have a way to change the level of that light, fade it down to the point where you get the right amount of light from the lights on the bike itself.

Other than that, this calls for bracketing the shots. Vary what you can with the light sources and take many pictures. Just be glad using a digital camera is cheaper than doing it with film.


Philip

  
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