Data function – Canon T 90 User Manual

Page 171

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Command Back 90

The Command Back 90 is an interchange

able camera back designed for exclusive
use with the T90. As the name “Command"
suggests, it not only records data but also
controls the T90 for various types of timed

photography.

The following operations are possible using

the quartz controlled Command Back 90:

DATA FUNCTION

1. Printing of the auto date up through the

year 2029. (automatic compensation for

leap years and long and short months)

2. Printing of the Day/Hour/Minute in a 24

hour format

3. Printing of an arbitrary 6-digit number plus

the letters A through F.

4. Printing of a frame counter number up to 4

digits.