It works! I've done two rapid tests. In a room with fluorescent lamp. One with ISO 100, f3.5 and 2 seconds exposure. The other with ISO 100, f3.5 too and 0,8 second exposure. Two pictures each, one picture with the remote flash option and one without it. You can see my hand in these pictures heh, these are with 2 seconds exposure.







I think this can be very useful in some situations as fill light or secondary light for Nature morte - Still life, portraits... even being the LED flash a bit weak.
Thanks again!