Reusing the lens of a consumer grade digital camera for a Flea camera

Since my first experiments with some lenses turned into a telelens, I needed somewhat smaller lens. In the past we had a medion camera, which looked somewhat like

medion
medion

After disasembling this camera and removing the lens and infrared filter:

medion disassembled

medion disassembled

medion disassembled

The lens itself was mounted on a switch to bring the lens slightly back or forth (to capture 'landscapes' versus 'flowers'). This switch was backed with an infrared filter and then by the bayer matrix. The infrared filter automatically creates distance between the matrix and the lens. However, either with or without this extra distance was I unable to put the lens onto the Flea camera such that it had a proper focus. Notwhithstanding, the results were not too bad. A small number of tests on the focus of the flea with the medion lens shows that the focus is somewhere between 25cm and 35cm. Well enough for close captures of mixing desks and the likes. We measured the focus by putting a book in front of the camera at a specific distance:

5 cm:

Focus 5 cm

10 cm:

Focus 10 cm

15 cm:

Focus 15 cm

20 cm:

Focus 20 cm

25 cm:

Focus 25cm

30 cm:

Focus 30cm

35 cm:

Focus 35cm

40 cm:

Focus 40cm

The actual flea with medion lens in front looks like

flea with medion lens

flea with medion lens
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