Releasing external cameras with optical cable requires phones, which provide a torch mode for their camera flash and a camera connection cable with a phototransistor to release the external camera. Check my website for details.
Bugs found? Please send error report for error loclisation and removal as this App is still in Beta development stage!
Keywords: camera timer, timer, camera, photograpy, trigger, photo, automatic, flash, slr, dslr, remote, cable, release, usb host, Canon DSLR cameras, Nikon