Reversed-lens macro photography tests

A few test shots to compute magnification and evaluate depth of field. Note that the "aperture" is incorrect, since I don't know the actual focal lengths when the lens is reversed (they appear to be pretty long, so the f/# is probably a smaller aperture than reported). Also note that the depth of field test shots aren't lined up consistently, so they may not be as useful as I'd hoped (though they do convey just how narrow the focused region is!)

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  18mm @ max magnification (focus close)
  
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  55mm @ min magnification (focus @ "infinity")
  
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  Depth of field at 18mm, wide open (f/3.5 @ 18mm)
  
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  Depth of field at 55mm, wide open (f/5.6 @ 55mm)
  
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  Depth of field at 18mm, with aperture set to f/8 when the lens was mounted forward and at 18mm zoom
  
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  Depth of field at 55mm, with aperture set to f/8 when the lens was mounted forward and at 18mm zoom
  
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  Depth of field at 18mm, with aperture set to f/11 when the lens was mounted forward and at 18mm zoom
  
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  Depth of field at 55mm, with aperture set to f/11 when the lens was mounted forward and at 18mm zoom
  

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