Poll: What lens do you want to see next?

Lee Jay wrote:

John Sheehy wrote:

Lee Jay wrote:

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's not how it works. TCs don't report to the camera, they report to the lens, and the electrical way they report only supports either a 1.4x or a 2x. So, now the lens knows its attached to a TC (or it doesn't in the case of TCs that don't report), and it's up to the lens to report that to the camera.

You're talking about what could be done within the limits of what is done in certain TCs. What would prevent a TC, designed to do so, from pretending to be the lens?

How? It would have to completely interpret the camera signals, choose which to relay to the lens, choose which lens signals to relay back to the camera, put its own data in the stream in the proper places, and do it all in real time. This is a serial stream (I think it's the Motorola 68HC05 serial communications protocol) so doing that all correctly for all available lenses, first and third party, and doing it all without significant delay would be a pretty big challenge.

I thought that this was a wish thread.

Anyway, it's a shame that protocols are almost always created with no foresight.