If I'm shooting in auto exposure mode it will almost always be TAv.
Unless you're shooting a completely static scene on a good tripod,
shutter speed will affect the way the photo looks. Unless everything in
the scene is beyond the hyperfocal distance and you are below a
diffraction limiting f-stop, aperture will affect the way a photo looks.
In most cases, the noise or dynamic range from various ISOs will affect
the image less, and will have a lower chance of causing a photo to be
unusable, than either of the other two.
Yesterday morning, I took a few minutes out of cleaning up my yard to
photograph a snake I caught. I had never seen one like this, and wanted
to post some photos to facebook which I often refer to as my "auto-bon",
because I can post pictures of wildlife, and they will automatically be
identified for me. After two people marked one of the photos as a
favorite I was moving it into my monthly best-of and noticed that it was
shot at ISO 10,000.
I'll admit, that I had noticed a little noise in the background, but
with my K20, any shot of the sky would show worse noise at ISO 800,
possibly 400. Welcome to the twenty first century where an ISO 10,000
photo might look "a little rough in the shadows".
https://www.flickr.com/photos/ellarsee/16565623039/in/set-72157651226463471
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Larry Colen [email protected] (postbox on min4est)
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