Canon EOS R10 built-in flash used as an optical sender/trigger/master for Canon EX/EL flashes?

[laserfaire]

Can the EOS R10 built-in flash trigger external Canon EX/EL flashes that can accept optical (not radio) signals.  I realize that it cannot be used to trigger radio-only flash units.

[Waddizzle]

It should.  You need to have a direct line of sight and the built-in strobe is pretty weak.  It only points in the same direction as the camera.

[jrhoffman75]

Consult the camera manual.