Resolution Test on DigitalCamera

Diffraction transition by stop
TestChart
m105-f110.jpg

TestChart
Test chart printed on letter size paper. Center red box field is used to evaluate resoluton. Images below are 100% image and are not enlarged nor downsized. White balance was taken on the white field right below the center and images are then transformed into grayscale. Sharpening and tone-curve adjustments are not applied.
JPG compression is applied in order to publish on internet. Raw data has more resoluton, but all data had applied same compression so they should be comparable.
Body:Nikon D1x Lens:Micro-Nikkor 105mm f/2.8D
ISO200, AWB, ModeA, Center
m105-f030-c.jpg

F3
Both resolution and contrast are bad by open iris. Not recommended for practical use.
m105-f056-c.jpg

F5.6
Both resolution and contrast will raise if you close your lens stop to F5.6.
m105-f080-c.jpg

F8
You will have sharpest image around F8.
m105-f110-c.jpg

F11
Still has enough sharpness.
m105-f160-c.jpg

F16
Still has enough sharpness.
m105-f030-c.jpg

F22
It is believed that resolution will drop by diffraction if you close the lens iris too much. This test case shows that F22 still has enough sharpness and can be used practically. Telescopic Macro Lenses has less effect by diffraction.


OperationRoom
ImageSample(Ope)
ImageSample(Microscope)
Hardware