You can only capture in passing on replying move so you can't make another move and then later capture in passing - NOT that capture anyway.
You can capture any other pawn that tries to sneak past by jumping 2 squares.
In the diagram : if it were black's move she could push the pawn to square h5 and not worry about being captured en passant since there was no double-jump involved.
Moving the f-pawn to f5 would be different and white would then have to decide to capture or not. The Bishop could not capture in passing since only pawns can.