The following table summarizes the structures of the MakerNote field used by different vendors.
| Make | Models | Format | Specifications | Remarks |
| Canon | IFD | [2] | ||
| Casio |
QV-3000EX, QV-2000UX, QV-8000SX |
IFD | [4] | "Early" versions of QV-2000UX and QV-8000SX only have 4 bytes in the MakerNote field. |
| Fujifilm | IFD; starts with string "FUJIFILM" and an offset to the first IFD, offsets are relative to the beginning of the MakerNote | [1] | Fujifilm's Exif data uses Motorola alignment, but the MakerNote uses Intel alignment | |
| Minolta | IFD | [5] | MakerNote numbers are always stored in Motorola/Macintosh style | |
| Nikon | E990, D1 | IFD (from offset 0x00) | [3] | |
| Nikon | E700, E800, E900, E900S, E910, E950 | IFD; starts with string "Nikon", IFD from offset 0x08 | [1] | |
| Olympus | D450Z(C-920Z) | IFD; starts with string "OLYMP", IFD from offset 0x07 | [1] | |
| Sanyo | DSC-MZ2 | IFD | [6] | Tag 0x00ff contains the offset to the start of the MakerNote(?). The semantics of the value is different in TIFF and JPEG images |
| Sigma, Foveon | IFD; Starts with an 8-byte ID string "SIGMA\0\0\0" or "FOVEON\0\0" | [7] |
Exif.org has another table with similar info and sample pictures: Digital Camera Sample Images. According to this source, (at least some) Ricoh and Kodak cameras do not write the MakerNote in IFD format.
[1] Exif
file format by TsuruZoh Tachibanaya
[2] EXIF MakerNote
of Canon by David Burren
[3] MakerNote
EXIF Tag of the Nikon 990 by Max Lyons
[4] "MakerNote"
Exif tag of Casio by Eckhard Henkel
[5] Minolta
MakerNote by Dalibor Jeline
[6] Sanyo
MakerNote by John Hawkins
[7] SIGMA and FOVEON EXIF MakerNote Documentation by Foveon