11-08-2011, 08:19 PM
Thanks Wim! That is a lot of numbers. I like pictures better. Kidding, but they say that there is a part of a joke in every joke, you know.
With all seriosness:
1. I don't understand how a starting constant of 1600 describes every lens. Shouldn't the resulting diffraction limit in line pairs per millimeter be different for different lenses?
2. My math is way off.
Lens diffraction limit (1600/22)*2=145.45
Nikon D700 pixel spacing is 8.45 µm, so sensor diffraction limit is 3.2x8.45=27.04
Now if you put this together: 1/145.45 + 1/27.04 = 0.043857 - thats nowhere near 20.
What am I doing wrong?
With all seriosness:
1. I don't understand how a starting constant of 1600 describes every lens. Shouldn't the resulting diffraction limit in line pairs per millimeter be different for different lenses?
2. My math is way off.
Lens diffraction limit (1600/22)*2=145.45
Nikon D700 pixel spacing is 8.45 µm, so sensor diffraction limit is 3.2x8.45=27.04
Now if you put this together: 1/145.45 + 1/27.04 = 0.043857 - thats nowhere near 20.
What am I doing wrong?