I've been reading up on E-TTL and E-TTL II, with only little understanding. After reading about it here a little http://en.wikipedia.org …EOS_flash_system#E-TTL_II and here http://www.usa.canon.com …ArticleAct&articleID=2930 and on other sites....
I am trying to recognize this E-TTL "preflash" but I cannot.
I know about the obvious FEL preflash if that's used, but when I just shoot normally with the EX flash on Automatic and E-TTL (it's E-TTL II I assume), I don't see the preflash that supposedly "occurs immediately before the main flash"...all I see is the single, main illuminating flash. Am I missing something? When the flash is on manual, does this E-TTL metering or whatever not happen because you are controlling the settings yourself??
Also, I've read the flash basics in the booklet, looked up a few tips online, but still don't get it. With SLR cameras themselves, it was easier to eventually pick up on the more advanced workings and functions of exposure/settings/etc. But so far, with this flash, I do not understand one bit what I am doing with it other than a few bouncing techniques and always using the Speedlite in Auto mode.
When I attempt to look at the other settings/manual settings of the flash, I feel like it is the most confusing thing ever that is difficult to properly use in combination with the camera settings to get the right flash exposure.
AKA For some reason I just am not grasping all the settings and workings of the cam in conjunction with the flash and vice versa. I just do not understand how to use the camera's manual aperture/shutter speed/ISO settings in conjunction with the flash. It's odd to me because it seems like I choose almost any combo of those settings, and the pic comes out similar every time (flash being on auto).
Basically, when using the flash, what do you do with all these camera and flash settings?!?! (Keep in mind I am fine when I typically shoot an SLR with manual cam mode with no flash..I just keep my eye on the light meter and keep the settings proper to keep it as a good exposure. But I don't really grasp what to do with the flash on.
Also, do most ppl keep the flash on Auto, or is it necessary to learn the manual flash settings? When should I use the FEL preflash? Lots of questions!
EDIT: I will read these links too, but I assume I'll read a lot of the same things I've already been reading.. https://photography-on-the.net/forum/showthread.php?t=138907