I'm using a Sigma 50-500mm lens on my Maxxum 7D body. This records the various focal lengths between 50 and 500mm (35mm equiv. - actual 75-750mm) in the exif data. When I use either the 1.4x or 2.0x tele-converters the same focul length is being recorded. It looks like there is no way to tell from the meta data that the extenders were in use. I just wanted to check to see if this is indeed true or whether I missed some small piece of data that would indicate theit usage. Thanks. -- Jeffery Small