More ideas from stephane
http://www.ebay.com/itm/New-5-0-MP-Electronic-Digital-Eyepiece-USB-Video-CCD-Camera-Microscope-Eyepiece-/221882258997?hash=item33a9369635

interface, digital transmission adopts maximum data rate a dynamic video functions, it is very convenient for compressed format.

Le Vendredi Du Hobby - Episode 6 - Exercices de depart - YouTube

Le Vendredi Du Hobby - Episode 6 - Exercices de depart - YouTube