User Manual

Copyright 2012 Page 26
Response Values
Definition
d
Tag
ssss
Focus Distance
TT
Aperture Value – Actual Aperture Setting
tt
Aperture Ring T Stop Integer x 10 & the 1/10
th
fraction
zz
Zoom - EFL (mm) [0000 for Prime lenses]
hhhh
Hyperfocal Distance
nnnn
Near Focus Distance
ffff
Far Focus Distance
vv
Horizontal Field of View
ee
Entrance Pupil Position
ZZ
Normalized Zoom Value
[This field not included in S4 I Prime lenses prior to 0.29 (4.01) or 0.39 (4.21)]
Sxxxxxxxxx
S followed by Lens Serial Number [ASCII format]
Example:
Issue: Kd[c/r]
Response: d@@FRCCŽˆ@@@USR@@FP@@FTADA¢@@S5/100-009[l/f][c/r]
(Typically 41 characters including termination)
Response Values Defined as Follows:
Note: None of these 8 bit data patterns correspond to any Control character codes.
Focus Distance:
ssss: Current Focus Distance units [1 mm] or [0.1 inch] depending on Display Units selected.
ssss represents packed binary response - 24 bits in 4 bytes (characters)
ssss
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
1
st
0
1
b23
b22
b21
b20
b19
b18
2
nd
0
1
b17
b16
b15
b14
b13
b12
3
rd
0
1
b11
b10
b09
b08
b07
b06
4
th
0
1
b05
b04
b03
b02
b01
b00
Range: 0 to (2^
24
-1) = 16777215[mm] or 0.0 to (2^
24
-1) = 1677721.5[inch]
Infinity: b00 … b23 = 1 (a binary value of all 1’s represents infinity)
Aperture Value
TT: Actual Aperture Setting (T Number x 100)