Do any of you have an explanation?
I’ve photographed the paintings of several artists for them to use digital images of their work for prints, websites, and book publishing.
I had a job a few years ago when I encountered a situation that I still don’t understand. This was on two of the paintings. Both of them were of deer and the antlers were painted in gold as the last paint added. These gold painted antlers were clearly visible both to the naked eye and on phone photos. However, when I photographed these with my Sony a7Riii, my camera ignored that paint and picked up the underlying paint color. I think the paint was some kind of translucent paint.
I’ve cropped the original photo in the two attachments to protect the artists creative work.
Not a specific idea but sensor/algorithm issue.
My godson is from Micronesia so relatively dark skin. I had a canon camera that without fail would render his face a pale disc each and every time. The camera always had the correct skin tone for the rest of him. A few years ago one of the computer companies had an issue with laptop web cams that could not
render people of African heritage correctly or sometimes not at all.
John Matthews wrote:
Not a specific idea but sensor/algorithm issue.
My godson is from Micronesia so relatively dark skin. I had a canon camera that without fail would render his face a pale disc each and every time. The camera always had the correct skin tone for the rest of him. A few years ago one of the computer companies had an issue with laptop web cams that could not
render people of African heritage correctly or sometimes not at all.
WOW, that’s another weird camera issue - and even more disturbing!
Maybe something to do with the infrared response of the sensor?
Try shooting in RAW. Then the camera will not try to enhance the photo.
I would suggest shooting the paintings on film, then scanning to produce a digital file.
Stan
BushDog wrote:
Do any of you have an explanation?
I’ve photographed the paintings of several artists for them to use digital images of their work for prints, websites, and book publishing.
I had a job a few years ago when I encountered a situation that I still don’t understand. This was on two of the paintings. Both of them were of deer and the antlers were painted in gold as the last paint added. These gold painted antlers were clearly visible both to the naked eye and on phone photos. However, when I photographed these with my Sony a7Riii, my camera ignored that paint and picked up the underlying paint color. I think the paint was some kind of translucent paint.
I’ve cropped the original photo in the two attachments to protect the artists creative work.
Do any of you have an explanation? br I’ve photogr... (
show quote)
As you already suspect, the metal paint is translucent. Perhaps your high resolution a7R-III can see thru it, but the phone and the eye are not really sharp enuf for that.
The gold paint makes me think it is a polarization effect similar to using polarized sunglasses to filter out surface reflections on water.
Just some related thoughts. Metallic paints have a clear lacquer base so they can be transparent under some conditions. Light reflecting from most surfaces is polarized. Metallic surfaces generally do not polarize light.
I would experiment with lighting angle and maybe even camera rotation or a circular polarizer.
Polarization is a weird quantum effect. You would think that if reflected light is polarized by a surface and then more light is removed by the sensor or a second polarizer, that the cross polarized light is irretrievably lost. But adding a THIRD polarizer can bring back light intensity.
Anyway I don't suggest that adding filters is what you want to do to solve your problem. It is just an interesting thought.
Sensors are made to capture natural colors very well...
Artificial light and colors present problems sometimes.
Artwork is full of unnatural coloring...which our eye mixes together...the sensor does not work that way.
Once again, white balance issue.
Use ACR auto and all the colors are available. Use dehaze to enhance, done.
follow the link in the post above yours
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