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[EmeraldEyes]

 

 Still trying to work with F-stop and sunlight: the first I used 7.1 for F-stop on Canon EOS 70D, I do not know how much is due to my shaky hands - even though I do my best to hold the camera steady by bracing my head on the eye piece, and holding the lens. I also have a small flexible leg tripod that works ok.

 
IMG_0768 - Copy.JPG (365.79 kB . 1000x571 - viewed 300 times)

 
IMG_0766 - Copy.JPG (639.09 kB . 1000x789 - viewed 307 times)

[55fossil]

Nothing wrong with those pics.   Try different background colors.  Amazing what white, grey or black can do to change the picture and show the stone better.

[irockhound]

They look good but it depends on what you are trying to achieve in the pics.  Both pics are of Geodes and because of the depth of the crystals your focus is shallow because you are using a low fstop.  Increase your fstop to get more depth of field.  Some of the issues can be the lens you are using also.  Going with a wide lens like 35 or 50mm helps and you can get good 50mm 1:1 lens relatively affordably. Always shoot tripod when shooting stones since they don't move so it makes it easier with a longer exposure at a higher F stop.  At low fstops your focal range may only be 1/16" or less making things like geodes a nightmare.  Remember that if you are using any type of zoom and are zoomed in you are going to be less successful than if you zoom out and take a crisper picture and crop the image after.