CliveyBoy wrote in post #15600944
Make sure you read the latest version!
The 5DIII and 7D have the full flash control menus also. The 7D ones are old-style and take two pages, unlike the 6D quick flash control panel. With all of them, you need to turn one Wireless (optical) to be presented with the Firing Group items.
Use Remote mode (not Mix mode) and leave the on-flash settings alone, at least until you have mastered the standard procedures. (OldVultureFace has covered the on-flash setting for FEC.)
Q. #2 is answered in TOYUG. 580EX works normally in E-TTL - with FEC, ratios, etc controlled from camera. The 580EXII works fully in E_TTL, with full control from the camera.
i think that you are mixing settings, and getting erratic behaviour from dirty contacts.
Your added post - the camera menus set either ETTL or Manual in remote mode. Either/or. They can be different in Mix mode, but that makes the camera settings largely ineffective.
You really do need to do your homework and learn how the 622s actually work, and then see how various configurations can be achieved.
Thank you for all your help, Clive. I've read your PDF completely and have done a good amount of testing how the system works, feel like I have a handle on things.
Not sure about the dirty contacts, I have several 580ex flashes and they all seem to work the same. I just think I was trying to do something that isn't compatible with the 622 system (using the 580ex in eTTL, trying to adjust FEC on flash while the off camera YN568 flashes are set to manual mode, it seems I need to be in mix mode for this to work the way I'm thinking it will). Anyway, that is all fine, I know how to use mix mode and find it very useful.
I have had one other anomaly, if I use the YN568 flash on-camera on the 622 in eTTL mode, with another flash off-camera, if I try to adjust the FEC on the flash menu below zero, it consistently over exposes (the opposite of what it should be doing). It seems to work ok if I add exposure with the flash FEC control, or with no FEC adjustment, but not when I do negative FEC adjustment. I've confirmed this is consistent with both of my YN568 flashes, and seems to act the same way with whichever camera I use (7D, 6D or 5Dmk3). If I use the ratios and set the off camera flash to B group, I can do the ratio control from the camera and it works fine. Also, if I put a 580ex or 580exII on-camera, it works fine using the FEC control on the flash menu, just not when using the YN568.
I haven't tried this with just the YN568 on the camera, no 622, to see if it's the flash itself, but in that situation I would use the FEC control on the camera, not the flash anyway. None if this is a major problem, I don't really need to use the YN568 on-camera, I bought them to use off-camera. And using the on-flash FEC control isn't necessary, I just find it's a little quicker to adjust that way, rather than scrolling though the camera menu and changing settings that way, it's more of a shortcut route for me, I like being able to work really fast sometimes. I mostly do wedding photography, and speed is very desirable in that situation.