User Manual

Copyright 2012 Page 56
N or n
ddd
Infinity Nodal distance: N or n indicates sign plus 3 digits-S4 I Prime
only
s (+/ -)
eee
Entrance Pupil Position: + or – sign plus 3 characters - S4 I Prime only
U
b
Start-up units: I=imperial, M=metric,
b (metric start) or B (imperial start) [both available]
T
ff
Transmission factor (not yet available in S4 I Primes)
y..y
SPACE characters
B
v.vv
Firmware version number
A.1.3 Kd Command Variations:
Retrieve Pre-Defined Set of Calculated Binary Data Packets
Response for lens versions BEFORE 0.21, 0.34, .22 and 1.31:
Issue
Kd[C/R]
Tag = d
Response
d s s s s TT t t z z h h h h n n n n f f f f v v e e Z Z [L/F][C/R]
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
Z or ZZ
Normalized Zoom Value – (see version #s below for format)
[This field not included in these early versions of S4I Prime lenses]
Response Values: d, sss, TT, tt, zz, hhhh, nnnn, ffff, vv, ee are the same as those
described in Section 5.1.3.
Normalized Zoom Value ZZ: (Note: Response depends on Lens Version #)
ZZ: Normalized Zoom Value – 0.000 to 1.000 for S4I Zoom and RED versions after 1.21,
1.30 and 3.02
10 bits in 2 bytes (characters)
ZZ
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0