I am planning on buying a second hand ETTL flash for my Canon 550D. What are things I should pay close attention to when buying a second hand flash? For example: is there a parameter, comparable to ...
As I understand, the required flash power for correct exposure is determined by aperture, ISO and subject distance. It shouldn't matter whether a human subject is dressed in black or white -- the ...
I have a couple of 600EX-RTs and a Canon 5DMkIII. I am using group mode (or manual mode) with the flashes set on manual. Why does the FEL not work in manual mode?! It works in ETTL. It seems like ...
I have the Canon Speedlite 580EXII for 3-4 years now, and I have used it with a 450D and more recently with a 60D. With both bodies, there was a very weird behavior where ETTL or even TTL will ...