User Manual

Copyright 2012 Page 43
the default display units set as imperial. If the value after Tag U is a ‘b’, the calibration
table stores focus distances in both imperial and metric units with the default display
units set as metric.
6.2.2 Cooke 5I Lens Units and Startup Units Commands
5I lenses have a dual marked focus ring that can be reversed to show either
imperial or metric units. 5I lenses have been factory calibrated in both imperial and
metric units and the factory set Start-Up Units should match the focus ring units.
The Start-Up Units can be checked by issuing the N Command or the OS Command.
The value after Tag U in the command response will always be either a ‘B’ or ‘b’, where
B indicates the default display focus distance values are in imperial units and b indicates
the default display units are metric. (See also Commands X and Y and 5I specific
commands, OS, OX and OY.) Commands OX and OY will change the display default units
on both 5I channels (by changing the ‘B’ to a ‘b’ or changing the ‘b’ to a ‘B’) while
Commands X and Y will change only the current display units on the channel the
command was sent.
The newest 5I lenses have an internal switch which can be used to automatically
change the Start-Up Units when the focus ring is reversed. Earlier 5I lenses should be
issued the OX or OY commands to set the Start-Up Units to either imperial (OX) or
metric (OY) so the display units will correspond correctly to the selected focus ring.