pinhole lens
Shown here is a image from my home made 4"x10" pinhole camera, the print is made by contact printing.
4x10 inch gelatin silver print
this is a "100% crop" at 300dpi
To my eye this is not too bad for what it is. This pinhole lens was made with a piece of an aluminum coke can, practically free and not very refined at that. Though crude it can likely get much sharper...