D2X vs EOS: Depth of Field—1Ds Mark II

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point C

f4 f5.6 f8 f11 f16 f22

Center sharpness of the 24-105/f4L is outstanding, with essentially no improvement as the lens is stopped down.   Sharpness does decline beginning at f16 and increasing at f22 due to diffraction.

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point B1
Top row is no sharpening, bottom row is Unsharp Mask 500, 0.3, 4

f4 f5.6 f8 f11 f16 f22
 

Stopping down to f11 achieves the best results, with f16 being about the same.

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point B2

f4 f5.6 f8 f11 f16 f22

Stopping all the way down to f22 is required to make Point B2 sharpen up reasonably well.

 

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point P

f4
f5.6
f8
f11
f16
f22
Peak sharpness is reached at f22.

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point F1
Top row is no sharpening, bottom row is Unsharp Mask 500, 0.3, 4

f4 f5.6 f8 f11 f16 f22

 

Canon EOS 1Ds Mark II, 24-105/f4L@70mm, Point F2
Top row is no sharpening, bottom row is Unsharp Mask 500, 0.3, 4

f4 f5.6 f8 f11 f16 f22

This far forward from the plane of focus the image quality improves right down to f16, and remains about the same at f22.

 


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