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In the image below the sugar cube was 48mm from the lens. This is the minimum distance that this lens will focus.
The next image shows the sugar cube at 90mm from the lens.
The sugar cube measures 16mm x 14mm.
In this next sample image the penny (d=20.3mm) was at a distance of 20cm from the lens. The sensor used was a 1/3" Aptina MT9V024.
This lens has a large focal length and minimal distortion.
In these next images the sensor used was a 1/4" Sony ICX618. The first image is focused at a distance of 38mm from the lens and the second at 55mm. This lens has a medium f number of f4.0 creating a reasonable depth of field while still allowing a good amount of light to reach the sensor.