New update on my recent purchase of Yongnuo's 622c
If I use FEL while the wireless function is enabled (wether in A+B+C, A:B, or A:B C) then it works perfectly. However, anytime I have the wireless function disabled and I use FEL I get complete overexposure. It's like it just fires 1/1 every time regardless of what subject I use the FEL on, when something more like 1/64 would suffice.
I am using a Canon 5D mkII and a 580EXII with my 622c's in E-TTL mode set to Evaluative. Exposure compensation set to 0.
I did lots of testing last night and long story short, it is still doing the same thing.
The long story, I tested the following:
-622 factory reset (both units)
-580EXII custom functions reset
-New batteries in everything
-Switching transmitter for receiver and vice versa
-1st curtain, 2nd curtain, HSS
-Evaluative vs average
What I noticed was that 80-90% of the shots after using the FEL button would produce completely over exposed (complete white out) shots when I had wireless disabled. With wireless enabled it works perfect every time. I also noticed that when wireless was disabled occasionally the FEL button no longer worked as in it would not fire a pre-flash. It still had the previous FEL in memory (blinking lightning bolt with * in viewfinder) but the only way to get it to stop doing this was to shut everything off and then turn them back on. Regular shooting with wireless disabled was always fine, but when I would use FEL it was sporadic at best with only about 10% correct exposure, no matter what I did.
One thing I am only now thinking of that I could have also tested was different lenses. I was using my 85mm f1.2 L lens which I believe does not transmit distance information for E-TTL use, I guess I should test a lens that does transmit distance and see if it still does the same thing.
I have a feeling that these were returns someone sent back to them, because the plastic cover on the top of one of them has a little corner that had been pulled back and essentially marked, as if someone tested them and wanted to mark the "broken" one.
Has anyone here also had this issue? Can you guys test your devices to see if mine is a one off or this is a common thing. Can you think of anything else I should try or do you think there is something wrong with my units.
If there is a problem with my devices, does anyone have any suggestions on what I should do about it? I only received these last week, bought them direct off Yongnuo's ebay store. Not sure it would be worth me sending them back to hongkong, as the shipping alone would probably cost me too much, and no guarantees I would get a completely working model.
These issues have made me start to regret going with Yongnuo for these. I had already purchased another set last week and they told me they shipped it last friday (March 1st) yet when they finally gave me the tracking number yesterday after I had to ask 3 times for it, it shows that they have only scheduled it to be shipped yesterday March 6th (The item (RC*******HK) was posted on 6-Mar-2013 and is being processed for delivery to the addressee)! These issues have also made me reconsider going ahead with my purchases of a few yongnuo 568 flashes. I no longer have any trust in Yongnuo's direct ebay store!