hi phil,
Sigma APO 300mm F2.8 EX DG HSM gives here lensid FB 54 8E 8E 24 24 4B 02,
you can see that the LensIDNumber is different from exiftools recent value '48 54 8E 8E 24 24 4B 02'.
im wondering about this, has this lens another one (additional) lensidnumber?
bye, bozi