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Poll: What lens do you want to see next?

Started Nov 18, 2014 | Polls thread
40d_dane Senior Member • Posts: 1,034
Re: I'll up you one.

John Sheehy wrote:

Another thing I'd like is switches on a TC to determine what is reported and whether or not to trick the camera, like the Kenko Pro DGX TCs do. When no reporting is used, one might still want the identity of the lens changed in the metadata to reflect the presence of the TC, so you can tell when it was used. It might also be useful to change the identity of the lens by the TC to allow separate MFA settings for the lens when used with the TC.

That will never happen ! The "reporting" system works just like Canon want it to work and they don't want it to work any other way. What happens is that the attached TC will short 2 or all of the 3 extra TC-contacts on the lens in the lens mount. The lens then changes its reporting to the camera accordingly. Prior to the mk III TC's no Canon TC contained electronics. The marketing material on the mk III TC's say that they actually contain active electronics. You can disable/modify the TC reporting by taping the 3 TC contacts in the lens mount. Use isolation tape to make a 1.4 TC invisible. Use conductive tape to make a 2x TC "report" as a 1.4 TC. Please note at any experimentation with taping contacts will be entirely at your own risk !

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