https://community.usa.canon.com/t5/Speedlite-Flashes/St-E3-RT-Compatibility/m-p/35703#M1704 <P>Is the ST-E3-RT Transmitter and 600EX-RT combo fully compatible with the Canon 1D Mark IV without any of the restrictions noted in the transmitter user guide on page 19 (eg. cameras produced up to 2011)???</P> Mon, 29 Jul 2013 03:16:30 GMT dbholc 2013-07-29T03:16:30Z https://community.usa.canon.com/t5/Speedlite-Flashes/St-E3-RT-Compatibility/m-p/35703#M1704 <P>Is the ST-E3-RT Transmitter and 600EX-RT combo fully compatible with the Canon 1D Mark IV without any of the restrictions noted in the transmitter user guide on page 19 (eg. cameras produced up to 2011)???</P> Mon, 29 Jul 2013 03:16:30 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/St-E3-RT-Compatibility/m-p/35703#M1704 dbholc 2013-07-29T03:16:30Z https://community.usa.canon.com/t5/Speedlite-Flashes/St-E3-RT-Compatibility/m-p/35965#M1705 <P>Hi dbholc!</P><P>&nbsp;</P><P>Thank you for posting!</P><P>&nbsp;</P><P>The EOS-1D Mark IV was released before 2011, so the restrictions listed for these earlier models do apply.</P><P>&nbsp;</P><P>This didn't answer your question or issue? Find more help at <A target="_blank" href="http://www.usa.canon.com/cusa/consumer/standard_display/contact_us_consumer">Contact Us</A>.</P> Wed, 31 Jul 2013 10:32:55 GMT https://community.usa.canon.com/t5/Speedlite-Flashes/St-E3-RT-Compatibility/m-p/35965#M1705 Mykolas 2013-07-31T10:32:55Z