Help with EOS R100 and 550EX wireless settings

[shopstefanov89]

Hi everyone,

Could you please assist with wireless settings step by step for Canon EOS R100 as I can't find anything in google for it?
Thank you

[shopstefanov89]

ok, thank you for your help 🙂

[deebatman316]

If you do go the route of another speedlite with “RT” or EL-1 these speedlites support BOTH optical and Radio. If you do get those speedlites make sure they’re set to Optical Wireless instead of Radio Wireless. The newer Radio/ RT system is INCOMPATIBLE with the older Optical system. Also the ST-E2 is an older transmitter and IS NOT COMPATIBLE with the camera’s flash menu. All settings must be set on the transmitter itself. Settings are grayed out or missing. Newer Speedlites such as the 600EX II-RT will be compatible with the camera’s flash menu.

 

[deebatman316]

For my off camera flash work I don't use the ST-E2 transmitter instead I use the 600EX II-RT on the camera. Then off camera I use the old 550EX & 420EX on the left and right sides. The main flash is the 600EX II-RT which is on camera that send the signal out. The bottom portion of the speedlite where the Red "IR AF Assist Beam" is needs to be pointed back towards the camera. But the flash head itself can be repositioned to face the subject. The on speedlite or transmitter sends out a modulated pre-flash that the off camera speedlite(s) sees. This is what makes the off camera speedlite(s) fire. The 550EX needs to be set to Slave Mode for this to work. The ST-E2 can only be a master. All you have to do is make sure the 550EX & ST-E2 are set to the same channel and the same group. Flash Groups can only be "Group A" and "Group B" with the ST-E2. But if a speedlite is being used on camera and set to wireless mode "Group C" can be added in. Also Flash Ratios can be used. You can set one flash to fire more power or less if you use more than one off camera speedlite. The ST-E2 uses special batteries not regular AA Batteries like flash units. Instead it uses a special 2CR5 battery which isn't a typical battery that you see in stores. Another speedlite mounted on the camera may be a better choice because those use the normal AA batteries.

[shopstefanov89]

Thank you mate! That's realy helpful.