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Old Aug 19, 2013, 8:15 PM   #1
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Default color to monochrome to color

I usually shoot in raw and have never had this issue.
Today, I was in Glacier Nat. Park and shot some photos in jpeg. I shot 29 pictures, the first 8 were color, then the next 11 were monochrome, then the remaining 10 were color.
I made no changes to the settings, I only noticed it when I was reviewing my pictures back at the car.
Any ideas?
I have a Canon 50D, I was using a Sigma 18-200 lens. ISO of 640, AV.
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Old Aug 19, 2013, 9:24 PM   #2
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Does the exif indicate the shots were monochrome also? I can just about conceive of a problem with memory card doing this, but don't know why it would change back.
Are the photos still in the camera, or have you uploaded them to PC or more permanent storage yet?

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Old Aug 20, 2013, 12:47 AM   #3
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Uploaded to PC and deleted from Camera. I'll take a look at Exif data in Breeze Browser Pro and Lightroom.

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Does the exif indicate the shots were monochrome also? I can just about conceive of a problem with memory card doing this, but don't know why it would change back.
Are the photos still in the camera, or have you uploaded them to PC or more permanent storage yet?

brian
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Old Aug 20, 2013, 12:56 AM   #4
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In Breeze Browser Pro, it says color space to sRGB on both the color and monochromes. Is there something else to look at?
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Old Aug 20, 2013, 9:08 AM   #5
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Best guess is still a problem with the memory card. If you use a card reader, try running chkdsk on that card. If there are no errors found, reformat the card in your camera and try it again.

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Old Aug 20, 2013, 10:49 AM   #6
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Considering Canon's menu structure, I think it's unlikely that you might have accidently switched to the Monochrome Picture style and back again.

The Color Space would have been sRGB whether the image was color or monochrome.

I agree with VTphotog. I don't think much of it, but the memory card is the best explanation I can come up with.

Was it particularly cold, or particularly damp when you were taking your photos?
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Old Aug 20, 2013, 11:14 PM   #7
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it was warm and sunny. I've never had problems with this memory card. I'll shoot a bunch in raw and see how that looks.
I almost never shoot in jpeg, I wonder if that was a reason. Perhaps the card *is* defective when you shot in jpeg.

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Considering Canon's menu structure, I think it's unlikely that you might have accidently switched to the Monochrome Picture style and back again.

The Color Space would have been sRGB whether the image was color or monochrome.

I agree with VTphotog. I don't think much of it, but the memory card is the best explanation I can come up with.

Was it particularly cold, or particularly damp when you were taking your photos?
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Old Aug 21, 2013, 3:36 PM   #8
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RAW files don't contain color info, just luminance. The RAW processing after the file is moved from the card to a computer, matches up the luminance value from each photoreceptor with its color under the Bayer Filter.

JPEG files are encoded in the camera with the R, G, and B values for each pixel, before they are written to the card.

Upon further reflection, I don't think an error writing to or reading from the card could have done what you describe.

Whatever caused this is probably a result of some spurious condition. I'd revert the camera to the Default Settings, and hope it doesn't happen again.
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