Tried to find out AF offset value transfered from lens to camera on 550d with EF 50 1.8 II
after shot 3 and 4 jumpers http://www.fotuz.ru/images/2013/12/canon5018/13.jpg values changed to
On EF 100 f/2 values are similar, but changes whet focus moving
Code Select
0A 00 --> ACK
00 AA <-- ACK Answer
B0 00 --> Apperture?
00 16 <-- Display Av = 1.8
00 16 <-- Min Av = 1.8
A0 50 --> Zoom? <-- Max AV = 22
00 00
E4 32 <-- Zoom = 50 mm
00 24
B2 7A
00 38
00 02
00 59
F0 00
B0 08 --> Apperture?
00 16 <-- Display Av = 1.8
00 16 <-- Min Av = 1.8
00 50 <-- Max AV = 22
C0 00
00 00
00 00
F8 00
FC C4 <-- F8 = 196
FA D0 <-- FC = 208
FE C2 <-- FA = 194
00 D0 <-- FE = 208
0A 00 --> ACK
00 AA <-- ACK Answer
after shot 3 and 4 jumpers http://www.fotuz.ru/images/2013/12/canon5018/13.jpg values changed to
Code Select
F8 00
FC B4 <-- F8 = 180
FA C0 <-- FC = 192
FE BA <-- FA = 186
00 C8 <-- FE = 200
On EF 100 f/2 values are similar, but changes whet focus moving
Code Select
F8 00
FC DC <-- F8 = 220
FA EF <-- FC = 239
FE D5 <-- FA = 213
00 E4 <-- FE = 228
90 00
00 00
00 10
50 00
2F 50
0A 50 --> ACK
00 AA <-- ACK Answer
94 00
4B 84
90 00
00 00
00 10
44 00 --> Focus
00 44
56 44
0F 44
0A 0F --> ACK
00 AA <-- ACK Answer
94 00
4B 84
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 24
90 00
00 00
00 00
94 00
09 8C
C4 00
00 0E
C2 02
00 00
00 5E
00 00
00 5A
C0 00
00 F9
00 AD
94 00
30 84
F8 00
FC DB <-- F8 = 219
FA EF <-- FC = 239
FE D6 <-- FA = 214
F9 E5 <-- FE = 229
FD 07
00 00