Speedlites, Printers, Accessories / Re: Can 600EX-RT Be Used As Optical Slave With Elinchrom Like Nikon SB900 In SU-4« on: January 12, 2013, 01:26:17 PM »
Thank you for the link to the appropriate optical slave and advice. I shall order a few to keep in my bag. It's too bad that this great flash can communicate via radio and infrared, but Canon left out a plain vanilla optical trigger. Go figure. Thanks again for pointing me in the right direction.