wide test - the diff between 20mm and 24mm

I need to get a wide prime lens so I did a simple compare between 20mm and 24mm prime. Only these two I can afford and anything below 20mm is totally out of my budget.

Photos below are some image sharpness test @ the center

Nikon 35mm f2D @ f2.8

Nikon 24mm f2.8AI @ f2.8

Nikon 20mm f2.8D @ f2.8


verdict: Nikon 35mm f2D is the sharpest


Photos below are some image sharpness test @ the center and corner between Nikon 20mm f2.8D and 24mm f2.8D

Corner test

Center test

verdict: no obvious sign of different between these two lenses on center and corner!