Originally posted by palmor Unfortunately none the current TC's out there transmit the correct focal length
Is this a confirmed fact?
Couldn't it be that Tamron when adding support for SDM to their TC (see the two little contacts in the inner part of the mount?) added the appropriate focus length multiplier as well? I mean, SDM and SR were introduced simultaneously, with the K10D. And a TC contains a micro chip...
@jgredline: Could you please confirm that the EXIF of pictures shot with the TC are the same as EXIF shot without, i.e., same focal length and same 35mm equivalent focal length?
EDIT:
Sorry, looked it up myself from the two samples put by Bramela above: both say 70mm. Same for EXIFs in initial post of jgredline.