Canon RE-350 Focus Commands, OP AF Operate Auto Focus, $10 $ 1 $ 0, Focus Near Constant Speed

3.2 Focus Commands

OP AF (Operate Auto Focus)

•Function:

Perform AF once, finding out the best focused position.

•Timing of the “C-response Packet” sent to the PC:

Right after having found out the best focal point or, after a 6 second trial, having failed to find the best focal point.

•The parameter of the “C-response Packet”: $0000 fixed

•The maximum operation time (msec): 20000 millisecond

•Command format:

Header ID number Command Parameter MSH Parameter LSH

$10

$ 8 *

$ 1 0

$ 0 0

$ 0 0

Focus Near: Constant Speed

•Function:

Moves the focus lens in the near direction at a constant speed. This operation will be stopped with the reception of the <Stop focusing> command or the focus lens reaches the near-end limit.

•Timing of the “C-response Packet” sent to the PC: Right after the focus lens starts to move.

•The parameter of the “C-response Packet”: $0000 fixed

•The maximum operation time (msec): 500 millisecond

•Command format:

Header ID number Command Parameter MSH Parameter LSH

$10

$ 8 *

$1 2

$ 0 1

$ 0 0

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