Canon Patent For Second Row Of Electronic Contacts

Egami (translated) spotted a Canon patent concerning a second row of electronic contacts on the lens mount. The patent suggests the second row of contacts is dedicated to the video signal, avoiding loss of signal strength could be the reason (the video signal needs more power supply).

• Patent Publication No. 2013-21391
  • 2013.1.31 Release Date
  • 2011.7.7 filing date
• Canon patent
  • In addition to the conventional first electronic contact, provided new second electronic contacts
  • Contact each other first and second non-overlapping so that
  • Corresponding to the new system
    • In addition to the video sync signal
    • In the serial clock, eliminating the need for transformation of the communication level
    • Because the focus of video requires a larger power supply