I received a comment the other day from one of my viewers stating that she does not always know what she is seeing. I am making an effort to address that need by my slight change of format. Please note Facebookers: You will see a link like this after the title of the blog: http://ift.tt/2ovlRD5 It is a bitly link to the actual blog on which you will see more images of subject. The above link does not lead to this blog.
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| Cuprite |
This small sample is from Morenci, Arizona. It is about 1/4" wide.
Cuprite is a minor ore of copper. The crystals have many faces and according to Wikipedia there is also internal reflection. The reflections are not too much of a problem at this size but the problem intensifies as the view moves in.
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| Cuprite |
As the view moves in the camera metering does not keep up and the faces become over exposed. The camera and the Photoshop histogram do not show the blown out pixels. I found that they are blown out when I tried to burn them to bring the exposure down on the overexposed faces. Burning does not work because there are no pixels there to burn.
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| Cuprite |
This is my best shot of the sample at FOV 10/64". There are still a couple faces blown out in this. I have gravitated toward underexposure of the shot at least a negative 1.5 stops. This gets the faces exposed under control and I can add fill light in Camera Raw to the raw files.
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