Macro Sharpness Test: This test was taken to demonstrate the effects of aperture on DOF and sharpness. The test subject was a Spotted Flower Chafer, chosen due to the fine detail in its hair and body as well as being relatively "deep" providing a good test for DOF and sharpness. The test was taken with a 20D on a tripod using a remote release (TC-80N), the beetle was still alive (as variations in leg position show) but turned on his back to limit movement. Each frame was shot at 1/320s ISO 400, exposure was adjusted for using a MT-24EX flash ring. Apart from increasing exposure on each frame by +0.67 in raw conversion and removing dust spots, no editing (including noise reduction/sharpening) was done.

This frame shows a 100% detail crop from the beetle at f/22

Other Images in series:

• 
  Entire beetle, f/5.6
• 
  Entire beetle, f/11
• 
  Entire beetle, f/22
• 
  Crop of beetle showing detail at 100%, f/5.6
• 
  Crop of beetle showing detail at 100%, f/11

fir0002 flagstaffotos [at] gmail.com Canon 20D + Sigma 150mm f/2.8

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