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Messages - JP79dsfr

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1
Reverse Engineering / Re: EF Lens communication protocol
« on: June 11, 2017, 01:00:12 PM »
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I can confirm 0x85 working on the Canon EF 24-105mm f/4 L IS II USM.

My most recent lens is a 70-200 is II or 50 stm .......... but, the serial num is also in the exif (just like the old 300/2.8 ), and effectively not in the micro Af adjust menu.

Are you the complete format of the dialogue for uptade of my doc ?

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Reverse Engineering / Re: EF Lens communication protocol
« on: May 25, 2017, 12:44:15 PM »
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@JP79dsfr:
The lens serial number for Canon EF-lenses is transmitted with the 0x85 command.

Sorry, but i don't think so. The command 0x85 is no active with my lens (old 38-76, 50/1.4, 50/1.8 stm, 70/200 is v2 ....)

What are your sources out of curiosity ?

3
Reverse Engineering / Re: EF Lens communication protocol
« on: November 29, 2016, 12:46:26 AM »
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according to your paper the serial number of the lens is not readable via the protocol?

Sorry, i dont find the SN register

All my lens and my body (5d3 last) dont read this info  in direct acces by the menu AF adjustement, but my 70-200 is II inject the valid SN into the picture's EXif with the 5D3. The Lens SN is therefore transmitted by the protocol.

I do not have time anymore for this search. If you may be looking into the excel file or the source logical analyser file (links are in the PDF)

Perhaps 0x84 function but i dont know how this can be coded => answer to the function 0x84=0xF4D4 046C D900 5849 0000, constant regardless the lens configuration, and SN = 0730010492.

Good luck.

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Maybe it will help us to understand differences between 5D2 and 5D3 protocols.
I do not have a 5d2, maybe the 5d2 is the same protocol version of 40D

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Are you in the '79'?
Near "La rochelle"  :)

5
Reverse Engineering / Re: EF communication protocol
« on: November 27, 2016, 03:46:19 PM »
I do not know if it can help but this is the Word original file : http://jp79dsfr.free.fr/_Docs%20et%20infos/Photo%20Tech%20_%20Canon%20EOS-EF%20Protocol.docx


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Reverse Engineering / EF Lens communication protocol
« on: November 24, 2016, 11:47:43 PM »

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