This item is for the OLYMPUS
T20 and can be used in two ways:
1. Full-Automatic control by OM-2 -
This sets the T20 to Full TTL mode for use on any Olympus camera
with TTL flash capabilities (OM2, OM-2n, OM-3, OM-3Ti, OM-4,
OM-4Ti, OM-101, OM-707...)
2. Manual/Auto Mode - This enables the
T20 to be set to Manual or one of two Automatic Modes. The ASA
is set using a slider and the correct apperture can then be manually
set using the scale on the panel.
See your T20 instructions.