Thanks all, I was hoping the 270 had that feature to be “optically triggered”. Yongnuo it is, I won’t need it often but would be nice to pack a flash while travelling with the small cam.Thanks again Rav
The EOS m100 has no hotshoe or has a Wireless radio transmitter to the best of my knowledge.. That’s why I was hoping to use built it flash to optically trigger external off shoe flash for occasions away from home