| Section | Bytes | Type | Make Model | Hex value | Value | Decoded |
|---|
| Canon-1D Makerno 0x000f-0012 | Size: 1 | 1=uByte_08 | Canon Canon EOS-1D Mark II | 0x1200 | 0 | Assist button and AF Point Selection button |
| Canon-1D Makerno 0x000f-0012 | Size: 1 | 1=uByte_08 | Canon Canon EOS-1D Mark II | 0x1201 | 1 | Assist button |
| Canon-1D Makerno 0x000f-0012 | Size: 1 | 1=uByte_08 | Canon Canon EOS-1D Mark II | 0x1202 | 2 | Assist button when held down |
| Canon-1D Makerno 0x000f-0012 | Size: 1 | 1=uByte_08 | Canon Canon EOS-1D Mark II N | 0x1200 | 0 | Assist button and AF Point Selection button |
| Canon-1D Makerno 0x000f-0012 | Size: 1 | 1=uByte_08 | Canon Canon EOS-1Ds Mark II | 0x1200 | 0 | Assist button and AF Point Selection button |