Graeme, I do have to mention that now that I know I can read the 4x6 targets without the TID for the DTP20, It doesn't matter much. I do like being able to read charts untethered. But this is working fine. I just have never been able to get the TID to read from any of my targets on a 4x6. Never had any problems with anything letter size and up. Bob On Thu, Sep 8, 2011 at 11:12 PM, Graeme Gill <graeme@xxxxxxxxxxxxx> wrote: > Bob Coss wrote: > > Were you able to look at the image I sent you of the TID from a > ColorElite > > 4x6 target? > > I suspect that by fitting fewer patches on the sheet, they make > it somewhat easier to read. There doesn't seen to be anything > noticeably different about the TID, except that the user definable > field is filled with a (presumably) fixed pattern. > The Argyll chart uses that to record the random start value. > > Graeme Gill. > > -- Hay que aprender algo nuevo todos los días